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1 General aspects (0)   1.1 Epidemiology (4)   1.2 Population genetics (1)   1.3 Pathogenesis (1)   1.4 Quality of life (7)   1.5 Glaucomas as cause of blindness (1)   1.6 Prevention and screening (11) 2 Anatomical structures in glaucoma (0)   2.1 Conjunctiva (0)   2.2 Cornea (13)   2.3 Sclera (4)   2.4 Anterior chamber angle (3)   2.5 Meshwork (0)     2.5.1 Trabecular meshwork (8)     2.5.2 Schlemms canal (0)     2.5.3 Scleral outlet channels (0)   2.6 Aqueous humor dynamics (0)     2.6.1 Production (1)     2.6.2 Outflow (0)       2.6.2.1 Trabecular meshwork (3)       2.6.2.2 Uveoscleral (1)     2.6.3 Compostion (2)   2.7 Episcleral veins and venous pressure (0)   2.8 Iris (3)   2.9 Ciliary body (3)   2.10 Lens (1)   2.11 Vitreous body (0)   2.12 Choroid, peripapillary choroid, peripapillary atrophy (1)   2.13 Retina and retinal nerve fibre layer (24)   2.14 Optic disc (18)   2.15 Optic nerve (4)   2.16 Chiasma and retrochiasmal central nervous system (0)   2.17 Stem cells (0)   2.20 Other (0) 3 Laboratory methods (0)   3.1 Microscopy (1)   3.2 Electron microscopy (0)   3.3 Immunohistochemistry (5)   3.4 Molecular genetics (0)     3.4.1 Linkage studies (12)     3.4.2 Gene studies (10)   3.5 Molecular biology incl. 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with intraocular tumors (0)     9.4.9 Glaucomas associated with elevated episcleral venous pressure (1)       9.4.10 Glaucomas associated with hemorrhage (1)     9.4.11 Glaucomas following intraocular surgery (0)       9.4.11.1 Ciliary block (malignant) glaucoma (0)       9.4.11.2 Glaucomas in aphakia and pseudophakia (4)       9.4.11.3 Epithelial, fibrous, and endothelial proliferation (0)       9.4.11.4 Glaucomas associated with corneal surgery (0)       9.4.11.5 Glaucomas associated with vitreoretinal surgery (1)     9.4.15 Glaucoma in relation to systemic disease (12)     9.4.20 Other (2) 10 Differential diagnosis e.g. anterior and posterior ischemic optic neuropathy (5) 11 Medical treatment (0)   11.1 General management, indication (7)   11.2 Cholinergic drugs (3)   11.3 Adrenergic drugs (0)     11.3.1 Epinephrine (0)     11.3.2 Thymoxamine, dapiprazole (0)     11.3.3 Apraclonidine, brimonidine (6)     11.3.4 Betablocker (4)     11.3.5 Other (0)   11.4 Prostaglandins (12)   11.5 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Without tube implant (13)     12.8.2 With tube implant or other drainage devices (7)     12.8.3 Non-perforating (7)     12.8.4 Using laser (0)     12.8.5 Other (1)     12.8.10 Woundhealing antifibrosis (11)     12.8.11 Complications, endophthalmitis (3)   12.9 Trabeculotomy, goniotomy (0)   12.10 Cyclodestruction (5)   12.11 Cyclodialysis (1)   12.12 Cataract extraction (0)     12.12.1 Intracapsular (0)     12.12.2 Extracapsular (0)     12.12.3 Phacoemulsification (5)   12.14 Combined cataract extraction and glaucoma surgery (0)     12.14.1 Intracapsular (0)     12.14.2 Extracapsular (1)     12.14.3 Phacoemulsification (6)   12.15 Capsulotomy (0)   12.16 Vitrectomy (0)   12.17 Anesthesia (2)   12.20 Other (1) 13 Therapeutic prognosis and outcome (0)   13.1 Prognostic factors (5)   13.2 Outcome (0)     13.2.1 IOP (1)     13.2.2 Visual field (0)       13.2.2.1 Progression (4)       13.2.2.2 Improvement (0)     13.2.3 Other (0) 14 Costing studies; pharmacoeconomics (5) 15 Miscellaneous (2)

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Abstract #19293 Published in IGR 9-3

Evaluation of retinal nerve fiber layer thickness measurement following laser in situ keratomileusis using scanning laser polarimetry

Dada T; Chaudhary S; Muralidhar R; Nair S; Sihota R; Vajpayee R
Indian Journal of Ophthalmology 2007; 55: 191-194

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AIM: To evaluate the effect of laser-assisted in situ keratomileusis (LASIK) on the measurement of retinal nerve fiber layer thickness by scanning laser polarimetry using customized corneal compensation in myopes. MATERIALS AND METHODS: Scanning laser polarimetry was performed on 54 eyes of 54 healthy patients with myopia using the glaucoma diagnostics variable corneal compensation (GDx VCC) instrument (Laser Diagnostic Technologies, San Diego, California) before and a week after LASIK. The various parameters were compared using the Student's t test. RESULTS: No statistically significant change was observed in any of the retinal nerve fiber layer parameters before and after LASIK. CONCLUSIONS: While the measurement of retinal nerve fiber layer thickness by scanning laser polarimetry is affected by anterior segment birefringent properties and LASIK would be expected to produce changes in the same, customized corneal compensation using the GDx VCC seems to adequately compensate for these changes.

Dr. S. Nair, Department of Clinical Ophthalmology, Dr. R. P. Centre for Ophthalmic Sciences, AIIMS, New Delhi, India. soman791@rediffmail.com

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Classification:

6.9.1.2 Confocal Scanning Laser Polarimetry (Part of: 6 Clinical examination methods > 6.9 Computerized image analysis > 6.9.1 Laser scanning)
8.4 Refractive surgical procedures (Part of: 8 Refractive errors in relation to glaucoma)

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