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Biomedical subjects

Rajesh Fogla

Publications and source records attributed to Rajesh Fogla.

16 recordsLinked to original sources

Results of deep lamellar keratoplasty using the big-bubble technique in patients with keratoconus.

PURPOSE: To evaluate the efficacy of deep lamellar keratoplasty using the big-bubble technique in patients with keratoconus. DESIGN: Interventional case series. METHODS: Thirteen eyes of 12 patients (eight male and four female subjects) with moderate to advanced keratoconus and intolerance to contact lens wear were included in this study. Deep lamellar keratoplasty was performed by the intrastromal air injection technique. Full-thickness donor tissue devoid of Descemet membrane and endothelium was then sutured into place. Best-corrected visual acuity, refractive results, surgical technique, and complication rates were analyzed. RESULTS: Big bubble was successfully achieved in nine eyes (69.2%). Average postoperative best-corrected visual acuity was 20/25 (range 20/50 to 20/20) at a mean follow-up of 5 months. Intraoperative microperforation of Descemet membrane occurred in two eyes (15.3%). Three eyes (23%) developed a steroid-induced increase in intraocular pressure, which responded to medical therapy. CONCLUSIONS: Deep lamellar keratoplasty that uses the big-bubble technique is safe and effective in patients with keratoconus. Visual outcome is comparable to standard penetrating keratoplasty, without the risk of endothelial rejection.

Adolescent↗

Initial results of small incision deep lamellar endothelial keratoplasty (DLEK).

PURPOSE: To evaluate the results of replacing the posterior stroma and endothelium, using small incision deep lamellar endothelial keratoplasty (DLEK) surgical technique, in patients with corneal endothelial dysfunction. DESIGN: Noncomparative case series. METHODS: Fifteen eyes of 15 patients (six males and nine females) with endothelial dysfunction were included in this study. Through a 5-mm scleral incision, a deep lamellar pocket was created across the cornea, followed by excision of an 8.0-mm disk of posterior lamellar corneal tissue. Same size lamellar donor disk was prepared and placed in position without the need of suture fixation. Best spectacle-corrected visual acuity (BSCVA), refraction, endothelial cell density, corneal topography, and corneal thickness were analyzed. RESULTS: Average BSCVA preoperative was 20/200 (range 20/40 to hand movements (HM)), improving to 20/50 (range 20/20 to 20/120) at a mean follow-up of 7.2 months. Average refractive astigmatism at last follow-up was 1.46+/-1.21 diopters (range, 0 to 4 diopters). Preoperative average donor endothelial cell density was 2047+/-311 cells/mm2, and that at last follow-up was 1732+/-514 cells/mm2. Preoperative average pachymetry was 801.4+/-211.3 microm, improving to 553+/-90.4 microm at last follow-up. CONCLUSIONS: Initial results with small incision DLEK procedure indicate that it is a safe procedure that provides healthy donor endothelial cell count and function postoperatively, with encouraging visual results.

Adult↗

Deep anterior lamellar keratoplasty combined with autologous limbal stem cell transplantation in unilateral severe chemical injury.

PURPOSE: To evaluate the efficacy of deep anterior lamellar keratoplasty combined with autologous limbal stem cell transplantation for ocular surface reconstruction and visual rehabilitation in eyes with unilateral, late-stage, severe chemical injury. METHODS: This was a retrospective, noncomparative, interventional case series that included 7 eyes of 7 patients, with severe unilateral late stage chemical injury, exhibiting corneal vascularization, conjunctivalization, and extensive corneal scarring were treated at the C. J. Shah Cornea Service, Sankara Nethralaya, a tertiary care center. Surgical procedures included releasing symblepharon adhesions, excising epibulbar fibrous tissue, superficial keratectomy to remove fibrovascular tissues over cornea, deep anterior lamellar dissection, grafting a lamellar corneal button, and transplanting autologous limbal graft, with or without amniotic membrane transplantation. The main outcome measures were relief of patient symptoms, postoperative recovery of the ocular surface, corneal clarity, corneal epithelial stability, and best corrected visual acuity. RESULTS: The mean duration between the injury and surgery was 24.4 +/- 21.8 months. No intraoperative complications were noted. Successful epithelialization was achieved in all eyes. The reconstructed corneal surface remained stable during the entire follow-up period (mean follow-up, 16.57 +/- 5.12 months). All patients had resolution of ocular symptoms. Remarkable improvement in vision was noted in all (85.7%) except 1 eye in which recovery was limited due to amblyopia. The average best corrected visual acuity at last follow-up was 20/50. No complications were noted in the donor fellow eye. CONCLUSIONS: DALK combined with autologous limbal transplantation can restore a healthy, stable ocular surface, besides providing a clear cornea that remarkably improves the visual acuity, in patients with unilateral, late stage, severe chemical injury.

Adolescent↗

Bilateral epithelial defects after laser in situ keratomileusis. Clinical features, management and outcome.

PURPOSE: To describe the preoperative characteristics, intraoperative details, management, and postoperative in patients with bilateral epithelial defects after laser in situ keratomileusis (LASIK). METHODS: Retrospective non-comparative case series. RESULTS: Six patients with bilateral epithelial defects after LASIK were part of a cohort of 605 patients undergoing bilateral LASIK at our center from December 2001 to April 2003. The mean age of the patients (5M:1F) was 28.5 +/- 7.9 years, and the average pretreatment myopic spherical equivalent (SE) refraction was 7.3 +/- 0.7 D (-4, -12.25D). An epithelial flap was present in 6 eyes and an epithelial defect with a mean diameter of 3 mm (2mm, 6mm) was seen in 6 eyes. In four patients the epithelial disturbance was bilaterally similar. All defects occurred in the inferior cornea and the epithelial flaps had the hinge positioned superiorly. None of the patients had ocular or systemic risk factors that could have resulted in this complication. A bandage contact lens was used in 6 eyes. At last follow-up of 5.5 +/- 9.5 months (0.25, 21 months), unaided visual acuity was 6/9 or better in 10 eyes. Best spectacle-corrected visual acuity (BSCVA) was maintained in 8 eyes, while 4 eyes lost one line of BSCVA. Recurrent corneal erosions were not reported in the follow-up period. CONCLUSIONS: These patients represent a hitherto unrecognised group of individuals who appear to have a subclinical weakness of adhesion of the corneal epithelium to the underlying structures, which is not evident on clinical examination. This results in bilateral epithelial disturbances after LASIK. Appropriate management results in satisfactory clinical outcomes. Other options for treatment of the fellow eye of such patients include the use of a different microkeratome, release of suction during the reverse pass of the Hansatome microkeratome, and photorefractive keratectomy if the refractive error is low.

Adult↗

Chronic microsporidial stromal keratitis in an immunocompetent, non-contact lens wearer.

An 82-year-old healthy man with unilateral chronic stromal keratitis, initially diagnosed to have viral keratitis and refractory to medical therapy, showed numerous oval, microsporidial organisms, measuring 4-5 m in length in the corneal biopsy. Penetrating keratoplasty, followed by treatment with systemic albendazole and topical propamidine isethionate resulted in resolution of the infection. Electron microscopy of the keratoplasty specimen demonstrated sporoblasts with diplokaryotic nuclei and multiple coils of the filament. The light and electron microscopic features were consistent with microsporidial keratitis.

Aged↗

Interrupted sutures at the hinge site to manage a free flap during laser in situ keratomileusis.

Two patients developed free flaps intraoperatively during laser in situ keratomileusis. After excimer laser treatment was performed, the free flap was replaced, maintaining proper alignment. Interrupted sutures were placed superiorly at the intended hinge site to secure the free flap. The uncorrected visual acuity was 20/30 in the affected eyes of both patients after treatment. At the 6-month follow-up, there were no flap-related complications and there was no loss of best corrected visual acuity.

Adult↗

Keratectasia in 2 cases with pellucid marginal corneal degeneration after laser in situ keratomileusis.

We report 2 patients who experienced progressive blurring of vision following myopic laser in situ keratomileusis (LASIK) in 1 eye (Case 1) and bilaterally (Case 2). High against-the-rule astigmatism, associated with perilimbal thinning inferiorly, was seen on refraction in all eyes. Regional corneal pachymetry confirmed the peripheral corneal thinning inferiorly. Corneal topography revealed the typical features of pellucid marginal corneal degeneration (PMCD) in the untreated eye of Case 1. Advanced changes were noted in the fellow eye. The corneal topography findings in Case 2 were similar to those seen in PMCD. Patients with early PMCD may present to the refractive surgeon with a stable refraction, normal corrected visual acuity, and adequate central corneal thickness. Corneal topography data along with regional corneal pachymetry must be interpreted carefully to detect these cases. Laser in situ keratomileusis can lead to a rapid progression of PMCD.

Adult↗

Ophthalmic photography using a digital camera.

PURPOSE: To report the application of a digital camera for ophthalmic photography in routine clinical use. METHODS: A digital camera (Nikon Coolpix 995) was used both for external macrophotography of the eye and ocular adnexa, and slitlamp photography of the anterior segment of the eye. RESULTS: We were able to take external macrophotographs under high magnification of the eye and ocular adnexa. Slitlamp photography could be performed under diffuse, slit beam, and retroillumination. The structures of the angle, the optic disc and surrounding retina could be photographed using appropriate lenses. The attachment to the operating microscope allowed intraoperative photography. It could also be attached to the laboratory microscope to capture images of various histopathology and microbiology slides. CONCLUSIONS: A digital camera is a versatile instrument for ophthalmic photography. It is easy to use in routine clinical practice and provides good quality photographs.

Eye↗

Keratoconus associated with cone-rod dystrophy: a case report.

A 31-year-old man with bilateral keratoconus associated with apical corneal scarring underwent uneventful penetrating keratoplasty in his left eye. Postoperatively his best-corrected visual acuity did not improve beyond 20/120. Examination of the fundus revealed features suggestive of bull's eye maculopathy. On performing an electroretinogram study of both eyes, grossly delayed implicit time with reduced amplitudes of the rod response and extinguished cone waveforms were noted, indicating cone-rod dystrophy. Color blindness was also noted on testing with Ishihara's pseudoisochromatic plates. Genetic counseling showed this to be an isolated defect with negative family history. Preoperative electrophysiologic studies may have a prognostic role in these cases.

Adult↗

Isolation of a vesicular virus belonging to the family rhabdoviridae from the aqueous humor of a patient with bilateral corneal endotheliitis.

PURPOSE: To report bilateral corneal endotheliitis caused by a vesicular virus (family Rhabdoviridae). METHODS: Case report of a 49-year-old man with a complaint of sudden onset of decreased vision in both eyes had diffuse corneal stromal edema with extensive folds in Descemet's membrane and was diagnosed as having bilateral viral endotheliitis. Virologic investigations were performed using aqueous humor from the right eye. RESULTS: An ether- and chloroform-sensitive cytopathic agent was isolated in Vero and BHK-21 cell lines from the aqueous humor. It was identified as a vesicular virus belonging to the family Rhabdoviridae by electron microscopy. Neutralizing antibody was demonstrated at a titer greater than 1 in 4,096 dilutions in the convalescent serum. Neurologic complications included loss of hearing and postinfectious polyradiculopathy affecting both lower limbs. Best-corrected visual acuity was 20/120 OD and 20/20 OS. Six months later, he developed glaucoma in the right eye. Trabeculectomy with intraoperative application of 5-fluorouracil was performed. CONCLUSION: This is the first report of bilateral endotheliitis caused by a vesicular virus and confirmed by virus isolation from the aqueous humor of the affected eye.

Aqueous Humor↗

Current approaches to diagnosis and management of ocular lesions in human immunodeficiency virus positive patients.

Human immunovirus infection in India is rapidly increasing. Ocular lesions due to highly active antiretroviral therapy have been well recognized. Acquired immunodeficiency syndrome can affect all parts of the eye. However, posterior segment lesions are the most common and of these, Human immunodeficiency virus retinopathy and cytomegalovirus retinitis predominate. Often clinical examination can establish the diagnosis of many ocular lesions in acquired immunodeficiency syndrome; therefore, ophthalmologists need to be aware of the more common ones. Various drugs in different routes can used to treat cytomegalovirus retinitis. Highly active antiretroviral therapy has remarkably reduced systemic and ocular morbidity among acquired immunodeficiency syndrome patients. To facilitate care of these patients aseptic precautions for ophthalmic care personnel are now well established and therefore ophthalmologist should not hesitate to provide ophthalmic care to acquired immunodeficiency syndrome patients.

Acquired Immunodeficiency Syndrome↗

Partial flap during laser in situ keratomileusis: role of smaller diameter corneal flap of original thickness.

PURPOSE: To report results of smaller diameter corneal flap of original thickness in the management of partial flap during laser in situ keratomileusis (LASIK). METHODS: Retrospective review of the case records of three patients (3 eyes) who had a partial corneal flap during LASIK. RESULTS: Retreatment was performed using an 8.5-mm-diameter corneal flap, which was smaller than the original partial flap of 9.5-mm diameter. The recut depth was maintained as the original cut depth of 160 microm. No intraoperative or postoperative complications were noted. At follow-up 4 weeks later, two patients had an uncorrected visual acuity of 20/20. One patient had uncorrected visual acuity of 20/40 that improved to preoperative best spectacle-corrected visual acuity of 20/30 with a correction of +0.50 -1.25 x 170 degrees. CONCLUSION: A smaller diameter corneal flap of original thickness can be used for retreatment of partial flap during LASIK. A thicker posterior stromal bed after laser ablation may be retained with this technique, compared to retreatment using a corneal flap of greater thickness.

Adult↗