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At least 55 records · Page 3Linked to original sources
PubMed2000

One-year results of laser vision correction for low to moderate hyperopia.

OBJECTIVE: To assess the efficacy and safety of hyperopic laser vision correction using a refined ablation architecture and the VISX STAR Excimer Laser. DESIGN: Prospective noncomparative case series. PARTICIPANTS: Fifty-two eyes with hyperopia from +1 to +6 diopters (D) spherical equivalent (SE) with or without cylinder < or =1.5 D based on cycloplegic refraction. Hyperopia was primary or caused by prior overcorrection of myopia. INTERVENTION: Hyperopic laser vision correction using a 9 mm/5 mm ablation profile and a pulse rate of 10 Hz. We prescribed ciprofloxacin and fluorometholone four times a day for 1 week. MAIN OUTCOME MEASURES: SE; uncorrected visual acuity (UCVA); predictability within +/- 0.5 D, +/- 1.0 D, and +/- 2.0 D of target refraction (emmetropia); loss of best-corrected visual acuity (BCVA); haze, and all complications at 1, 3, 6, and 12 months. RESULTS: We treated 52 eyes (mean preoperative SE; +3.03 D). Forty-one eyes (78.8%) had primary hyperopia. At 3, 6, and 12 months, 66%, 67%, and 79% of all eyes had refraction within +/-0.5 D of emmetropia. At these same intervals, 83%, 88%, and 79% were within +/-1.0 D of emmetropia. At 12 months, all eyes were within +/-2.0 D. At 3 months, 85.4% of eyes had UCVA of 20/40 or better, with 95.3% achieving 20/40 or better at 6 months. At 1 year, all eyes (n = 19) had gained from 1 to 8 Snellen lines of UCVA, with most (n = 16) gaining between 3 and 7 lines. At 12 months, all eyes maintained preoperative BCVA or gained 1 to 4 lines. There was some early, transient haze < or = grade 1.5. There were no corneal infiltrates, decentered ablations, or infections. CONCLUSIONS: These data suggest that the 9 mm/5 mm hyperopic ablation profile of the VISX STAR can produce accurate corrections without significant, progressive regression. Refractive stability was achieved 3 months after surgery. We did not observe any differences in outcomes between eyes treated for primary hyperopia and eyes treated for prior myopic overcorrections. We believe the quicker ablation time (10 Hz pulse rate) helped patients maintain fixation and reduced the risk of decentration. There was a high degree of satisfaction among all patients, especially those with presbyopia.

Adult↗
PubMed2003

Laser-assisted subepithelial keratectomy and photorefractive keratectomy for the correction of hyperopia. Results of a 2-year follow-up.

PURPOSE: To evaluate and compare the efficacy, safety, predictability, and stability of laser-assisted subepithelial keratectomy (LASEK) and photorefractive keratectomy (PRK) for low to moderate hyperopia with a 2-year follow-up. SETTING: Department of Ophthalmology, Masaryk University Hospital, Brno, Czech Republic. METHODS: This prospective comparative single-surgeon study included 216 eyes of 108 patients with hyperopia who received PRK in 1 eye and LASEK in the contralateral eye. The mean patient age was 38.3 years (range 25 to 58 years). The mean preoperative spherical equivalent (SE) cycloplegic refraction was +3.67 diopters (D) +/- 1.15 (SD) (range +2.00 to +5.00 D), and astigmatism was less than 1.00 D. In each patient, PRK was performed in 1 eye (Group A) and LASEK was performed in the other eye (Group B) using the Nidek EC-5000 excimer laser. Postoperative uncorrected visual acuity (UCVA), best corrected visual acuity, contrast sensitivity, manifest and cycloplegic refractions, refractive stability and predictability, postoperative pain, and corneal haze were examined and statistically analyzed. A P value less than 0.05 was considered significant. RESULTS: At 1 week, the UCVA was 20/40 or better in 58% of PRK eyes and 85% of LASEK eyes (P =.037); at 2 years, it was 20/40 or better in 81% and 91%, respectively (P =.076). At 2 years, the UCVA for near was N8 or better in 73% of PRK eyes and 89% of LASEK eyes (P =.064). No patient lost 2 or more lines of Snellen visual acuity. The safety index was 1.03 in PRK eyes and 1.08 in LASEK eyes. Refractive stability was achieved at 6 months in LASEK eyes and at 12 months in PRK eyes. The mean SE cycloplegic refraction decreased from +3.58 D (PRK eyes) and +3.76 D (LASEK eyes) at baseline to +0.74 D and +0.32 D, respectively, at 2 years; in 57% and 78% of eyes, respectively, the refraction was within +/-0.50 D of the targeted refraction. Peripheral corneal haze scores at 3 to 9 months and pain scores at 1 to 3 days were significantly lower in the LASEK group than in the PRK group. CONCLUSIONS: Laser-assisted subepithelial keratectomy for hyperopia up to +5.00 D provided good visual and refractive results. It significantly reduced postoperative pain, grade of peripheral ring-shaped corneal haze, and regression of hyperopia. Hyperopic LASEK provided quicker visual recovery and achieved better efficacy, predictability, and refractive stability than hyperopic PRK.

Adult↗
PubMed1995

Automated lamellar keratoplasty for the correction of hyperopia.

Hyperopic automated lamellar keratoplasty (H-ALK) is a refractive procedure that corrects low to moderate hyperopia of up to +5.00 diopters (D). In this retrospective series, we examined the efficacy, predictability, and safety of H-ALK in 85 eyes in 49 patients. Follow-up was from 4 to 34 weeks (mean 18 weeks). Eyes were divided into three subsets: those in which we attempted an emmetropic result (n = 45), those in which we attempted to reduce, but not eliminate, hyperopia greater than 5.00 D (n = 23), and those in which we attempted a monovision result of -1.50 D (n = 17). In the eyes in which we attempted emmetropia, 76% achieved uncorrected visual acuity of 20/40 or better and 78.6% were within a range of -1.00 to +0.87 D. In those in which we attempted monovision, 47% achieved a spherical equivalent result between -2.50 and -1.00 D because of a tendency toward undercorrection. In those in which we attempted to reduce hyperopia, there was a mean correction of 4.33 D (standard deviation 1.36 D), with a range of 2.12 to 6.75 D. The most significant complication was a reduction in best corrected visual acuity of one to three lines in 11 of 85 eyes; this was transient in six eyes. These preliminary results compare favorably with those of other procedures to correct hyperopia.

Adult↗
PubMed1997

Clear lens extraction to correct hyperopia.

PURPOSE: To evaluate the effectiveness and safety of clear lens extraction with intraocular lens (IOL) implantation to correct hyperopia and to determine the most accurate and predictable method of IOL power selection. SETTING: The Eye Institute of Utah, Salt Lake City, Utah, USA. METHODS: The outcome of 20 phacoemulsification and IOL implantation procedures was assessed at a mean follow-up of 23.2 months (range 3 to 60 months). Intraocular lens power and predicted refraction were retrospectively evaluated in each eye with the SRK II and Holladay formulas with different attempted refractions based on the stabilized postoperative refraction. RESULTS: Uncorrected visual acuity (UCVA) improved from 20/200 preoperatively to 20/30 postoperatively. At the final examination, 89% of eyes achieved 20/40 or better UCVA. All eyes had 20/25 or better best corrected visual acuity (BCVA). No eye lost two or more Snellen lines of BCVA. There were no surgical or postoperative complications. The Holladay formula was more accurate than the SRK II formula. With the Holladay formula aiming for -1.00 diopter (D), the predicted mean postoperative spherical equivalent would be -0.21 D +/- 0.89 (SD); with the SRK II aiming for -1.50 D, it would be +0.43 +/- 1.10 D. The Holladay formula reduced the chance of postoperative residual hyperopia. CONCLUSION: Clear lens extraction with IOL implantation was an effective, safe procedure for the correction of hyperopia. However, this method was less accurate and less predictable for hyperopia below +3.00 D. With the Holladay formula aiming for -1.00 D, good visual and refractive results can be expected. Further study with a larger sample of patients and longer follow-up is needed to assess long-term safety and effectiveness.

Adult↗
PubMed2006

A G1103R mutation in CRB1 is co-inherited with high hyperopia and Leber congenital amaurosis.

PURPOSE: To identify the genetic basis of recessive inheritance of high hyperopia and Leber congenital amaurosis (LCA) in a family of Middle Eastern origin. MATERIALS AND METHODS: The patients were examined using standard ophthalmic techniques. DNA samples were obtained and genetic linkage was carried out using polymorphic markers flanking the known genes and loci for LCA. Exons were amplified and sequenced. RESULTS: All four members of this family affected by LCA showed high to extreme hyperopia, with average spherical refractive errors ranging from +5.00 to +10.00. Linkage was obtained to 1q31.3 with a maximal LOD score of 5.20 and a mutation found in exon 9 of the CRB1 gene, causing a G1103R substitution at a highly conserved site in the protein. CRB1 is a vertebrate homolog of the Drosophila crumbs gene, which is required for photoreceptor morphogenesis, and has been associated with either retinitis pigmentosa (RP) or LCA. This sequence variant has previously been reported as a compound heterozygote in one sporadic LCA patient. CONCLUSION: Although hyperopia has been associated with LCA, it is typically moderate and variable between patients with the same mutation. In addition, some CRB1 mutations can be associated with either RP or LCA. We have shown that hyperopia and LCA are linked to the mutant CRB1 gene itself and are not dependent on unlinked modifiers.

Blindness↗
PubMed2004

A survey of clinical prescribing philosophies for hyperopia.

BACKGROUND: Prescribing philosophies for hyperopic refractive error in symptom-free children vary widely because relatively little information is available regarding the natural history of hyperopic refractive error in children and because accommodation and binocular function closely related to hyperopic refractive error vary widely among children. We surveyed pediatric optometrists and ophthalmologists to evaluate typical prescribing philosophies for hyperopia. METHODS: Practitioners were selected from the American Academy of Optometry Binocular Vision, Perception, and Pediatric Optometry Section; the College of Vision Development; the pediatric and binocular vision faculty members of the colleges of optometry; and the American Association for Pediatric Ophthalmology and Strabismus. Surveys were mailed to 314 participants: 212 optometrists and 102 ophthalmologists. RESULTS: A total of 161 (75%) of the optometrists and 59 (57%) of the ophthalmologists responded. About one-third of optometrists surveyed prescribe optical correction for symptom-free 6-month-old infants with +3.00 D to +4.00 D hyperopia, but fewer than 5% of ophthalmologists prescribe at this level. Most eye care practitioners prescribe optical correction for symptom-free 2-year-old children with +5.00 D of hyperopia, and this criterion for hyperopia decreases with age. Most ophthalmologists (71.4%) prescribe the full amount of astigmatism and less than the full amount of cycloplegic spherical component, and most optometrists (71.6%) prescribe less than the full amount of both components. When prescribing less than the full amount of astigmatism, eye care practitioners do not tend to prescribe a specific proportion of the cycloplegic refractive error. CONCLUSION: Pediatric eye care providers show a lack of consensus on prescribing philosophies for hyperopic children.

Data Collection↗
PubMed2005

Hyperopia and educational attainment in a primary school cohort.

BACKGROUND: Vision screening addresses the visual impairments that impact on child development. Tests of long-sightedness are not found in most school screening programmes. The evidence linking mild-moderate hyperopia and lack of progress in school is insufficient, although strengthened by recent findings of developmental problems in infants. AIMS: To report on the relation between hyperopia and education test results in a cohort of primary school children. METHODS: A total of 1298 children, aged 8 years, were screened for hyperopia on the basis of fogging test results. School test results (NFER and SATs) were compared between groups categorised by referral status and refractive error. RESULTS: A total of 166 (12.8%) fogging test failures were referred for ophthalmic assessment. Ophthalmic tests on 105 children provided an accurate diagnosis of vision defects, for reference to their education scores. Fifty per cent of the children examined by optometrists required an intervention (prescription change, glasses prescribed, or referral). Mean (95% CI) NFER scores of children with refractive errors (summed for both eyes) >+3D (98.4, 93.0-103.8, n = 32) or >+1.25D (best eye) (99.3, 93.0-105.6, n = 26) were lower than the respective scores of children with a less positive refractive state (104.8, 100.7-108.9, n = 43) (103.6, 99.7-107.4, n = 49), the non-referred group, and total sample. The SATs results followed a similar trend. A high proportion of the fogging test failures (16%) and confirmed hyperopes (29%) had been referred to an educational psychologist, and the latter group contributed substantially to the poor education scores. CONCLUSIONS: The results of this study provide further evidence for a link between hyperopia and impaired literacy standards in children.

Analysis of Variance↗
PubMed1993

Transient hyperopia with lens swelling at initial therapy in diabetes.

The clinical courses of 10 eyes of five diabetic patients who exhibited bilateral transient hyperopia (maximum: 1:1-4.9 dioptres, spherical equivalent) after initiation of strict control of diabetes with or without insulin are reported. The hyperopia occurred within a few days after abrupt decrease in plasma glucose, progressed to maximum at days 7-14, and regressed gradually over 1 month thereafter. Transient cycloplegia had no effect on refractive error. During hyperopia, there were no significant changes in axial length or corneal curvature. However, thickened lens, decreased anterior chamber depth, and transient cataract were observed to significant degrees. It is suggested that the transient hyperopia, with lens swelling and opacity, was caused by decreased lens refractive index following water influx.

Adult↗
PubMed1989

Leber's congenital amaurosis associated with high hyperopia in four sisters.

The authors describe a family with five daughters, of whom four are affected with Leber's congenital amaurosis and high hyperopia ranging between +5.5 and +9 diopters. In addition, the second daughter is a little short for her age, and shows a slight dyscrania with prominent frontal and occipital bones, hypoplasia of the nasal bone, and deep and narrow orbits leading to marked enophthalmos. The symptoms are typical of Leber's amaurosis. All children have nystagmus, night blindness, weak or absent pupillary reflexes. Visual fields are constricted or not measurable. The electroretinogram is extinguished, and hyperopia of the axial type was confirmed by ultrasound. Fundus findings are variable with small, pale and somewhat protruding papillae (pseudo-papillitis), narrow retinal vessels, diffuse fundus pigmentation of pepper-and-salt type and unusual yellow coloration of the macular region (diffuse atrophy). The inheritance of Leber's congenital amaurosis is autosomal recessive. The combined occurrence of amaurosis and hyperopia in four children in one family, while the fifth is unaffected and has no refractive error, furnishes a further evidence for the existence of a particular amaurosis-hyperopia subtype of Leber's disease.

Blindness↗
PubMedDate not supplied

Long-term stability of refraction after intrastromal suture correction of hyperopia following radial keratotomy.

BACKGROUND: Our first series of nine cases using circular and interrupted sutures for hyperopia from overcorrected radial keratotomy was reported 2 years ago. Additional cases and long-term follow up with this technique are presented here. METHODS: Thirteen eyes of 12 patients with symptomatic hyperopia underwent corneal suturing with pursestring and interrupted sutures and were followed for 3 years. There were six original overcorrections and seven overcorrections after reoperation. The mean preradial keratotomy refractive spherical equivalent refraction was -3.85 +/- 1.40 RESULTS: The mean preoperative refractive spherical equivalent was +2.55 +/- 0.93 D (range +1.125 to +5.375 D). The mean follow up after the suturing procedure was 40 +/- 14.3 months with a range of 10 to 72 months. The change in refraction following suturing procedures averaged -1.84 D, resulting in an overall correction of 72% of the overcorrection. The mean increase of postoperative central keratometric power was 1.42 +/- 0.95 D. All eyes reduction of hyperopia. Uncorrected visual acuity was improved from 0.367 +/- 0.11 (20+60) preoperatively to 0.712 +/- 0.25 (20/30+) postoperatively. The average improvement was 3.3 Snellen lines. using the visual function score to assess the effectiveness of the procedure, we found 85% (11/13) of eyes obtained excellent or good results and 15% appeared fair or poor. In the 3 years since the study began, eight eyes had follow-up data from the previous study and the present study. During this period, an average change of refraction of only -0.19 D was observed. A refractive change less than 0.50 D was observed in 62.5% of the eyes, and all of the eyes had a refractive change within 1.00 D. There were no new complications and no loss of effect during the mean 43 months of follow up for those patients. CONCLUSION: Based on the 3-year follow up, we concluded that intrastromal pursestring and interrupted techniques are stable, safe, and effect procedures for correcting hyperopia following radial keratotomy, especially for less than +3.00 D.

Adult↗
PubMedDate not supplied

Lamellar keratoplasty for hyperopia.

PURPOSE: Lamellar keratoplasty for hyperopia (automated lamellar keratoplasty for hyperopia) can correct hyperopia by weakening the cornea with a deep lamellar resection. The safety and efficacy of the procedure is uncertain. METHODS: Twenty-four eyes of 17 patients underwent hyperopic lamellar keratoplasty using the automated corneal shaper (Chiron Corp, Irvine, Calif) by one surgeon using a flap technique. The mean attempted correction was +3.90 +/- 0.90 D (range, +2.00 to +6.00). The eyes were followed for 1 month (23 eyes) to 6 months (17 eyes). RESULTS: Six months after hyperopic lamellar keratoplasty, the mean difference between attempted and achieved correction was an undercorrection of +1.40 +/- 0.80 diopters (D) with 7 of 17 eyes within 1.00 D of the attempted correction. No eyes were overcorrected, and 15 eyes were undercorrected. In eyes with a refractive goal of emmetropia, uncorrected visual acuity was 20/40 or better in 13 of 15 eyes and 20/20 or better in 8 of 15 eyes. No eye lost two or more lines of spectacle-corrected visual acuity at 3 or 6 months postoperatively. Between 1 and 6 months, there was a mean hyperopic shift of 0.20 D. There was clinically significant epithelial ingrowth into the interface in two eyes. CONCLUSION: Hyperopic lamellar keratoplasty is an effective method of reducing hyperopia and induces little irregular astigmatism. The nomogram we used produces a consistent undercorrection. Refraction appears to stabilize at 1 month, but longer follow up is necessary to assess stability.

Adult↗
PubMedDate not supplied

Laser in situ keratomileusis to correct hyperopia from +4.25 to +8.00 diopters.

OBJECTIVE: To evaluate the efficacy and predictability of laser in situ keratomileusis (LASIK) for hyperopia in a prospective study of 54 eyes of 29 patients. METHODS: Before LASIK, 44 eyes (81.48%) had a spectacle-corrected visual acuity of 20/20 or better, and 54 eyes (100%) had 20/40 or better. Surgery was performed under topical anesthesia using the Keracor 116 excimer laser and Chiron automated corneal shaper. Mean follow-up was 19 months. RESULTS: Mean baseline uncorrected hyperopia was +6.50 +/- 1.33 D (range, +4.25 to +8.00 D). Mean uncorrected manifest spherical equivalent refraction was +0.44 +/- 1.95 D at 18 months after LASIK. Twenty-one eyes (38.8%) were within +/-0.50 D of emmetropia, 41 eyes (75.92%) were within +/-1.00 D, and 47 eyes (87.03%) were within +/-2.00 at 18 months after LASIK. Uncorrected visual acuity was 20/20 or better in eight eyes (14.81%) and 20/40 or better in 36 eyes (66.66%) 18 months after LASIK. Regression and undercorrection of more than 2.00 D occurred in seven eyes (12.9%) between the 3 and 6 month examinations; three of these seven eyes (42.8%) required retreatment to correct residual hyperopia. Three eyes (6.8%) lost two or more lines of spectacle-corrected visual acuity. CONCLUSION: Excimer laser keratomileusis in situ with the Keracor 116 appears to be an effective and safe procedure to decrease low and moderate hyperopia, but the predictability of the procedure needs improvement.

Adult↗
PubMedDate not supplied

Laser in situ keratomileusis for hyperopia after thermal keratoplasty.

BACKGROUND: The correction of hyperopia remains challenging because regression occurs often after treatment. The authors evaluated laser in situ keratomileusis (LASIK) using the Nidek EC-5000 scanning slit excimer laser to correct residual hyperopia after thermal keratoplasty. METHODS: Twelve eyes underwent hyperopic LASIK for residual hyperopia after thermal keratoplasty. All eyes were treated using the Nidek excimer laser and Chiron Automated Corneal Shaper. Hyperopic correction was done using a 5.5- to 7.5-mm ablation zone. RESULTS: Mean preoperative cycloplegic spherical equivalent refraction was +3.31 D (range, +1.00 to +6.50 D). Mean preoperative astigmatism was -0.48 D (range, 0 to -2.00 D). Postoperatively, all eyes achieved a reduction in hyperopia. After 1 year of follow-up, the mean refraction was +0.88 D (range, 0 to +1.50 D). Mean postoperative astigmatism was -0.38 (range, 0 to -1.50 D). Two eyes experienced improvement in visual acuity and 3 eyes had reduced visual acuity, but no other vision-threatening complications were reported. The rate of regression was slow over 24 months. No morphological changes on the radial thermal scars were observed. CONCLUSION: Hyperopic LASIK after thermal keratoplasty is safe and effective, and without vision-threatening complications.

Cornea↗
PubMedDate not supplied

Posterior chamber phakic intraocular lens for hyperopia.

PURPOSE: A Phase I U.S. FDA clinical study of a plate haptic posterior chamber phakic intraocular lens (STAAR Surgical Implantable Contact Lens) for treatment of hyperopia was conducted at 4 sites in the United States. The purpose of this report is to assess the short-term safety and efficacy. METHODS: Ten patients with hyperopia between +2.50 and +10.875 D were implanted in one eye each with the posterior chamber plate phakic intraocular lens and were examined at baseline and 1 day, 1 week, 1, 3, and 6 months after surgery. Mean baseline hyperopia was +6.63 D. RESULTS: At 6 months postoperatively, 7 of 10 eyes (70%) had an uncorrected visual acuity of 20/20 or better and 10 of 10 (100%) had 20/40 or better. Eight of ten eyes (80%) had a spectacle-corrected visual acuity within 1 line of baseline; the other two eyes (20%) had an improvement of 3 lines. Mean 6-month postoperative spherical equivalent refraction was +0.20 +/- 0.61D (range, -0.50 to +1.50 D), a reduction of 6.025 D from baseline. Eight of 10 eyes (80%) were within +/-0.50 D of emmetropia, 9 eyes (90%) were within +/-1.00 D, and all eyes (100%) were within +/-1.50 D. No operative or postoperative complications or adverse reactions were observed. CONCLUSIONS: Results support the short-term safety, efficacy, and predictability of the STAAR Surgical Implantable Contact Lens (plate haptic posterior chamber phakic intraocular lens) in the treatment of hyperopia.

Adult↗
PubMedDate not supplied

Two-year follow-up of laser in situ keratomileusis for hyperopia.

PURPOSE: To evaluate excimer laser in situ keratomileusis (LASIK) for hyperopia and its predictability. METHODS: We performed a retrospective study of 100 eyes that had LASIK for hyperopia to assess predictability and long-term stability of refractive results. The Chiron Automated Corneal Shaper was used to create the flap and the Keracor 117CT Chiron-Technolas excimer laser with the plano-scan program was used to ablate all corneas. RESULTS: Mean baseline spherical equivalent manifest refraction was +4.50 +/- 1.73 D (range, +1.25 to +8.50 D). Six months after LASIK, mean manifest spherical equivalent refraction was +0.72 +/- 1.87 D (range, -1.75 to +2.50 D), at 1 year, +0.88 +/- 1.73 D (range, -1.25 to +2.50 D), and at 2 years, +0.85 +/- 1.74 D (range, -0.50 to +2.75 D). Two years after LASIK, 45 eyes (74%) were within +/-1.00 D of intended correction and within +/-1.00 D of emmetropia. Uncorrected visual acuity was 20/40 or better in 50 eyes (82%) at 2 years; 29 eyes (37%) saw 20/20 or better. Undercorrection occurred more frequently in eyes with preoperative keratometric power of more than 45.00 D, when ablation zones less than 6 mm were used and when higher amounts of hyperopic correction were required. CONCLUSION: LASIK with the Keracor 117CT excimer laser appears to be an effective and safe procedure to correct hyperopia. Preoperative keratometric power, amount of hyperopia, and ablation zone diameter affect the efficacy and long-term stability of the procedure.

Adult↗
PubMedDate not supplied

Laser in situ keratomileusis for myopia and hyperopia using the Lasersight 200 laser in 300 consecutive eyes.

PURPOSE: To evaluate effectiveness, safety, predictability, and short-term stability of laser in situ keratomileusis (LASIK) using the LaserSight Compac-200 Mini excimer laser with software version 9.0, for all refractive errors. METHODS: One hundred fifty consecutive patients (300 eyes) that received bilateral LASIK for myopia, hyperopia, and astigmatism were studied prospectively. A new 9.0 software version applying a modified nomogram that takes advantage of bilateral surgery was used. Follow-up at 6 months was available for 267 eyes (89%). RESULTS: Six months postoperatively, 131 eyes (96.32%) in the low to moderate myopia group (-1.00 to -5.99 D; n=136) had a spherical equivalent refraction within +/-1.00 D, and 123 eyes (90.44%) were within +/-0.50 D of emmetropia. In the high to extreme myopia group (-6.00 to -25.00 D; n=114), 97 eyes (87.08%) had a spherical equivalent refraction within +/-1.00 D and 78 eyes (68.42%) were within +/-0.50 D of emmetropia. In the hyperopia group (+1.00 to +6.00 D; n=50), 44 eyes (88%) had a postoperative spherical equivalent refraction within +/-1.00 D, and 31 eyes (62%) were within +/-0.50 D of emmetropia. Mean change in spherical equivalent refraction at 6 months was less than -0.50 D in the low to high myopia groups and -1.16 +/- 0.55 D in the extreme myopia group. At 6 months follow-up, uncorrected visual acuity was 20/20 or better in 73 eyes (54%) in the low to moderate myopia groups and 21 eyes (18%) in the high to extreme myopia groups. In the hyperopia group at 6 months follow-up, uncorrected visual acuity was 20/20 or better in 31 eyes (62%) and 20/40 or better in 41 eyes (82%). Only two eyes had a temporary loss of two or more lines of spectacle-corrected visual acuity due to corneal folds that were surgically treated. Six months after LASIK, no eye had lost any lines of best spectacle-corrected visual acuity in this series. CONCLUSIONS: Our modified LASIK nomogram with the 9.0 software of the LaserSight 200 excimer laser (with a larger and smoother ablation pattern) resulted in safe and effective outcomes for the treatment of low to high myopia, astigmatism, and hyperopia.

Adult↗
PubMedDate not supplied

Laser in situ keratomileusis for hyperopia and hyperopic astigmatism with the Nidek EC-5000 Excimer laser.

PURPOSE: We evaluated the efficacy, predictability, stability, and safety of laser in situ keratomileusis (LASIK) for hyperopia and hyperopic astigmatism. METHODS: A retrospective study was performed for 92 eyes of 62 consecutive patients to evaluate uncorrected (UCVA) and best spectacle-corrected visual acuity (BSCVA) and manifest refraction before and 3 and 6 months after LASIK (Moria LSK-ONE microkeratome, Nidek EC-5000 excimer laser). Eyes were divided into groups: Group 1 (low hyperopia) for spherical correction of +1.00 to +3.00 D (22 eyes), Group 2 (low hyperopic astigmatism) for toric correction with spherical equivalent refraction of +1.00 to +3.00 D (18 eyes), Group 3 (moderate hyperopia) for spherical correction of +3.25 to +6.00 D (10 eyes), and Group 4 (moderate hyperopic astigmatism) for toric correction with spherical equivalent refraction between +3.25 and +6.00 D (18 eyes). RESULTS: At 3 and 6 months after LASIK, 68 eyes (73.9%) were available for follow-up examination. Percentage of eyes with a spherical equivalent refraction within +/-0.50 D of emmetropia for Group 1 was 54.5% (12 eyes); Group 2, 50% (9 eyes); Group 3, 40% (4 eyes), and Group 4, 38.8% (7 eyes). UCVA > or =20/20 in Group 1 was 14% and in Groups 2, 3, and 4, 0%. One eye (5.5%) lost two lines of BSCVA. CONCLUSION: LASIK with the Moria LSK-ONE microkeratome and the Nidek EC-5000 excimer laser reduced low and moderate hyperopia and was within +/-0.50 D of target outcome in approximately 50% of eyes. Undercorrection was evident in all groups. The procedure was safe.

Adult↗