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Results for “Lens Subluxation”

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At least 19 recordsLinked to original sources
PubMed2001

Lens subluxation: 10-years' experience at Chang Gung Memorial Hospital, Kaohsiung.

BACKGROUND: This study aimed to describe the clinical manifestations and surgical outcomes of subluxated lens. METHODS: Reviewing charts from January 1991 to June 2000, we studied 110 patients (123 eyes) who had lens subluxation at Chang Gung Memorial Hospital, Kaohsiung. For 21 eyes, patients accepted conservative treatment, and 102 eyes underwent surgery (8 eyes had Marfan syndrome; 18 eyes had idiopathic dislocation; and 76 eyes had experienced trauma). Indications of surgery included reduction in visual acuity, uncorrectable refractive error, and secondary glaucoma. RESULTS: There were 81 male and 29 female patients. Their mean age was 47.6 years (range, 2-76 years). The mean post-operative follow-up period was 22.24 months (range, 2-118 months). In spite of the different lens statuses, similar visual results were found between the surgical treatment group and the nonsurgery group. In the surgery group, 47 eyes (46.1%) achieved best corrected visual acuity (BCVA) of 20/40 or better. A total of 80 eyes (78.4%) achieved an improvement (log MAR change >0.3) in BCVA. The major postoperative complications included glaucoma (11 eyes), retinal detachment (9 eyes) and intraocular lens dislocation into the vitreous cavity (3 eyes). CONCLUSIONS: Results indicate that the presence of a subluxated lens alone is not an absolute indication for surgical removal. The lens status had no significant influence on surgical outcome. Most cases can achieve an improvement in BCVA after appropriate management.

Adolescent↗
PubMed2000

Secondary glaucoma associated with crystalline lens subluxation.

PURPOSE: To elucidate the clinical characteristics of secondary glaucoma associated with subluxation of the crystalline lens. SETTING: Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, Kyoto, and Department of Ophthalmology, Tenri Hospital, Nara, Japan. METHODS: This retrospective study comprised 14 eyes of 13 patients with uncontrolled intraocular pressure (IOP) and lens subluxation. The subluxated lens was extracted through surgery. RESULTS: Angle closure caused by the subluxated lens was complicated in 3 eyes. In the remaining 11 eyes, uncontrolled IOP elevation was found despite the presence of deep anterior chambers and wide open angles. A mean of 14.1 months +/- 13.7 (SD) after cataract surgery, IOP was well controlled (lower than 21 mm Hg) in all 14 eyes. Mean IOP was 15.4 +/- 2.2 mm Hg at the final examination. Complications included transient vitreous hemorrhage in 5 eyes, choroidal detachment in 2 eyes, and retinal tears in 1 eye. CONCLUSION: Lens extraction surgery was effective in controlling IOP in eyes with secondary glaucoma associated with lens subluxation.

Aged↗
PubMed1989

Neodymium:YAG laser zonulysis for treatment of lens subluxation.

Nine eyes with lens subluxation in seven patients (6 patients with Marfan's syndrome, 1 with idiopathic lens subluxation) were treated by neodymium:YAG (Nd:YAG) laser zonulysis. The procedure uses an Nd:YAG laser to lyse the zonules to obtain a clear aphakic visual axis. Pretreatment best-corrected visual acuity was 20/60 or worse in eight eyes (6 eyes less than or equal to 20/200). Movement of the crystalline lens was achieved after zonulysis in all cases (100%), and a clear aphakic visual axis, sufficient to maintain aphakic correction without diplopia or glare, was obtained in eight eyes (88.9%). The procedure was combined with optical iridotomy in three cases (33.3%). Five cases (55.6%) required more than one zonulysis treatment. Visual acuity improved two or more Snellen lines in all but one eye (7 eyes greater than or equal to 20/60). Four cases had complications which included: increased intraocular pressure (IOP), mild iritis, recurrent migration of the lens into the visual axis, and crystalline lens damage. The final two complications necessitated eventual surgical removal of the lens. These results suggest that Nd:YAG laser zonulysis may be of benefit as an alternative treatment modality for selected patients with lens subluxation.

Adult↗
PubMed1994

Transformation of IR spectra of the human lens capsule due to traumatic lens subluxation and correlation with the excised and dried lens capsule under different treatments.

Transformation of the secondary conformational structure of the human lens capsule after traumatic lens subluxation in a patient was investigated by Fourier transform infrared (FT-IR) microscopic spectrometry. The result was compared with the IR spectra of type IV collagen in crystalline state, solid film and aqueous solution and those of the excised and dried lens capsule under compression or treated with ethyl alcohol. The results indicate that the IR spectra of the intact human lens capsule after traumatic lens subluxation were the same as those of the rabbit lens capsule, except in the 1,100-1,000 cm-1 proteoglycan region, but were different from those of type IV collagen aqueous solution at the amide I and II bands and the proteoglycan region, although type IV collagen is a predominant component of lens capsule. Two new peaks at 1,054 and 1,023 cm-1 appeared on the IR spectra of the intact human lens capsule and on those of type IV collagen in crystalline state and solid film after compression but not in normal rabbit lens capsule and native type IV collagen. It was also found that all the IR spectra of the excised and dried lens capsule were similar to those of native type IV collagen in crystalline state and solid film.(ABSTRACT TRUNCATED AT 250 WORDS)

Animals↗
PubMed1990

Implantation of posterior chamber lenses in eyes with phakodonesis and lens subluxation.

Unilateral posterior chamber intraocular lens (IOL) implantation was performed after phacoemulsification or extracapsular cataract extraction in ten of 11 patients with phakodonesis or lens subluxation, which was bilateral in two cases. To facilitate placement of the IOL, the anterior capsule was opened with a YAG laser in nine patients. Intraoperative vitrectomy was performed in two patients, and posterior chamber IOL implantation was accomplished with fixation in the ciliary sulcus. Postoperative follow-up studies failed to demonstrate significant decentration or dislocation of the IOLs. Phakodonesis and lens subluxation are no longer considered absolute contraindications to implantation of posterior chamber IOLs.

Aged↗
PubMed2000

[Lens subluxation and glaucoma: indications and hazards of cataract surgery].

BACKGROUND: Iridodonesis is the clinical sign of lens subluxation. Acute glaucoma caused by a ciliolenticular block may develop. YAG iridotomy or peripheral iridectomy are rarely effective in controlling intraocular pressure. The results of phacoemulsification and posterior lens implantation for subluxated lens and glaucoma are reported. PATIENTS AND METHODS: Seven patients aged 69+/-9.5 years were followed up. All 10 eyes with subluxated lens and glaucoma had phacoemulsification and posterior chamber lens implantation. Two different groups relating to axial length could be analyzed. Intraoperative findings and postoperative glaucoma situation are reported. RESULTS: Six eyes had average axial length of 21.5+/-0.17 mm and previous acute glaucoma. Five of these eyes had therapeutic YAG iridotomy and one, peripheral iridectomy. All eyes had dysregulated glaucoma despite antiglaucomatous medications. After cataract surgery five of six eyes had regular intraocular pressure without any medication. Four eyes had average axial length of 24. 4+/-1.1 mm and chronic glaucoma. After complicated phacoemulsification three of these eyes had regular intraocular pressure with antiglaucomatous medication, one eye without. CONCLUSIONS: For short eyes with subluxated lens and preceding acute glaucoma, cataract surgery with posterior chamber lens implantation is an effective therapeutic procedure for IOP regulation. For chronic glaucoma with subluxated lens, conventional or surgical approach to glaucoma remains dominant.

Aged↗
PubMed1997

Iris hooks for phacoemulsification of the subluxated lens.

Phacoemulsification of the lens in eyes with zonular loss risks dislocation of the lens into the vitreous cavity. We describe the use of iris hooks after capsulorhexis to support the lens during surgery. With iris hooks, the lens can be stabilized, helping prevent additional loss of zonules and permitting retention of the capsule to support an intraocular lens.

Adult↗
PubMed2004

[Clinical applications of ultrasound biomicroscopy in diagnosis and treatment of lens subluxation].

OBJECTIVE: To evaluate the clinical value in diagnosis and treatment of lens subluxation using ultrasound biomicroscopy (UBM). METHOD: This study comprised 29 patients (32 eyes) that had cataract with subluxated lenses due to different causes admitted into our hospital between November 2000 and January 2002. All eyes received UBM examination preoperatively and postoperatively. Capsular tension ring (CTR) implantations were performed using different technique according to UBM examination. Then all patients received phacoemulsification and intraocular lens (IOL) implantation. The location of IOL and CTR and complications were evaluated postoperatively. RESULTS: Different kinds of subluxated lens shown different manifestations in UBM. The degree of zonular defect can be evaluated with UBM preoperatively. With UBM examination preoperatively, extent of lens subluxation less than 1/2 quadrant in 19 eyes while more than 1/2 quadrant in other 13 eyes were observed. Postoperative UBM examination in this series shown that CTRs were holding in place except one attached to the iris root. IOLs in 29 eyes were in proper position while IOLs in 3 patients were slightly tilted. CONCLUSIONS: The degree and extent of lens subluxation can be evaluated using UBM examinations preoperatively, which is necessary in the selection of surgical protocol. With postoperative UBM examinations, a precise observation on the actual location of CTR and IOL can be achieved to produce an objective evaluation of the surgical outcomes.

Adolescent↗
PubMed2002

[Clinical use of capsular tension ring during phacoemulsification in subluxated lens].

OBJECTIVE: To investigate the safety of capsular tension ring implantation during phacoemul- sification in the subluxated lens. METHODS: Capsular tension ring was implanted in 13 cases (14 eyes) of subluxated lens after continuous curvilinear capsulorrhexis during phacoemulsification. The luxated area was ranged from one third to three quarters of a circle. The capsular tension ring was necessary to be fixated on sclera if the luxated area was larger than half-quarter of a circle. After the ring was implanted, phacoemulsification was performed and foldable intraocular lens (IOL) was implanted. RESULTS: The capsular tension ring was successfully implanted in 14 eyes, including 11 IOLs fixated in the bag and 3 in ciliary sulcus. IOL positions in 12 cases were normal, and in 2 eyes, had slight tilt. The most common intraoperative complication was the rupture of capsular bag, and secondly, the loss of vitreous body. CONCLUSION: Capsular tension ring implantation is safe in the patient of lens subluxation during phacoemulsification. It can prevent the IOL decentration and decrease the vitreoretinal complication.

Adolescent↗
PubMed2007

Unilateral congenital corneal keloid with anterior segment mesenchymal dysgenesis and subluxated lens: case report and review of literature.

PURPOSE: To report the unusual association of unilateral congenital corneal keloid with anterior-segment mesenchymal dysgenesis and bilateral subluxated lens. METHODS: A 20-year old man presented with a mass lesion involving the left cornea. The corneal lesion had been present since birth. On biomicroscopic examination, a well-defined vascularized, grayish-white mass occupying the whole of the left cornea was seen. The right eye showed multiple peripheral corneal opacities with iridocorneal adhesions, a poorly defined supranasal limbus, and a subluxated lens. Excision biopsy of the mass was done for histopathologic examination. RESULTS: Histopathologic examination of the excised corneal mass showed features consistent with that of a corneal keloid: thickened keratinized epithelium, absent Bowman membrane layer, and fibrovascular hyperplasia composed of hyalinized collagen fibers with irregular orientation of the collagen lamellae. During penetrating keratoplasty of the left eye, an anomalous iris pattern with poorly defined angle and a supranasal subluxated lens was also observed. Extraction of the subluxated lens was also done. The graft failed subsequent to a nonhealing persistent epithelial defect. CONCLUSION: Our case report highlights the rare association of a unilateral congenital corneal keloid with anterior-segment mesenchymal dysgenesis and bilateral subluxated lens.

Adult↗
PubMed2003

[Surgical treatment of subluxated lens with cataract].

OBJECTIVE: To study the surgical treatment of the subluxated lens with cataract caused by broken suspensory ligament of the lens. METHODS: Phacoemulsification combined with intraocular lens implantation was performed in 21 eyes. Extracapsular cataract extraction with small-incision was performed in 6 eyes. The visual acuity, the position of IOL, and the postoperative complications were observed and analyzed. RESULTS: Postoperative vision was increased in all patients. Vision 3 days after the operation was 0.1 - 0.4 in 6 eyes and 0.5 - 0.8 in 21 eyes. Vision 1 month after the operation was 0.1 - 0.4 in 7 eyes and 0.5 - 0.8 in 20 eyes. The up-edge of IOL could be observed at normal pupil in only one eye. IOL positions were found to be diverged after dilation of the pupil in 2 eyes; no diplopia was experienced. There were no serious complications during or after the operation. CONCLUSION: If the operator has perfect skill and chooses the optimal method, a good result can be obtained in surgical treatment of the subluxated lens.

Aged↗
PubMed2001

[Phacoemulsification of the subluxated lens with cataract].

OBJECTIVE: To study the efficiency of phacoemulsification in the treatment of subluxated lens with cataract. METHOD: Phacoemulsification combined with intraocular lens implantation was performed on 19 eyes of 18 patients. RESULT: The visual acuity in 18 eyes was improved to different degrees. The visual acuity in one eye was not improved due to the preoperative macular contusion. CONCLUSION: Phacoemulsification for treatment of subluxated lens with cataract may decrease many complications occurring in the past procedure.

Adult↗
PubMedDate not supplied

Surgical treatment of hereditary lens subluxations.

BACKGROUND AND OBJECTIVE: To evaluate the effectiveness and results of pars plana vitreolensectomy approach with transscleral fixation of intraocular lens in hereditary lens subluxations. METHODS: Fifteen eyes of 9 consecutive patients with a mean age of 12.8+/-6.2 years (6-26 years) with hereditary lens subluxation were operated on and the results were evaluated in a prospective study. Surgery was considered if best spectacle corrected visual acuity (BSCVA) was less than 20/70. All eyes underwent a 2-port pars plana vitreolensectomy and transscleral fixation of an intraocular lens (IOL). RESULTS: The mean follow-up period was 12.6+/-7.5 months (6-22 months). There was no major intraoperative complication. Preoperatively, 8 eyes (53.3%) had a BSCVA of counting fingers (CF) and 7 eyes (46.6%) had a BSCVA of 20/200 to 20/70. Postoperatively, 14 eyes (93.3%) had a BSCVA of 20/50 or better. None of the patients had IOL decentration or intraocular pressure (IOP) increase during the follow-up period. There was a macular hole formation in 1 eye postoperatively. CONCLUSIONS: The early results of pars plana vitreolensectomy with IOL implantation using scleral fixation technique had shown that it not only promises a rapid visual rehabilitation but it is also a relatively safe method. More serious complications, however, may occur in the long term.

Adolescent↗
PubMed1989

Lens subluxation as a complication of cyclocryotherapy.

There are many well known complications of cyclocryotherapy. This case represents what we believe to be the first report of cyclocryotherapy leading to lens subluxation. The patient was a 14-year-old boy with a history of ocular trauma that had resulted in intractable glaucoma. Six locations were treated inferiorly using the freeze-thaw-freeze technique. Postoperatively the patient's zonular attachment was disrupted inferiorly and the lens subluxated superiorly. While remote trauma may have been partly responsible, we suspect that the cyclocryotherapy precipitated the lens subluxation.

Adolescent↗