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1 General aspects (0)   1.1 Epidemiology (5)   1.2 Population genetics (15)   1.3 Pathogenesis (6)   1.4 Quality of life (5)   1.5 Glaucomas as cause of blindness (0)   1.6 Prevention and screening (5) 2 Anatomical structures in glaucoma (0)   2.1 Conjunctiva (2)   2.2 Cornea (3)   2.3 Sclera (0)   2.4 Anterior chamber angle (0)   2.5 Meshwork (16)     2.5.1 Trabecular meshwork (0)     2.5.2 Schlemms canal (0)     2.5.3 Scleral outlet channels (0)   2.6 Aqueous humor dynamics (5)     2.6.1 Production (0)     2.6.2 Outflow (0)       2.6.2.1 Trabecular meshwork (0)       2.6.2.2 Uveoscleral (0)     2.6.3 Compostion (0)   2.7 Episcleral veins and venous pressure (0)   2.8 Iris (0)   2.9 Ciliary body (0)   2.10 Lens (0)   2.11 Vitreous body (1)   2.12 Choroid, peripapillary choroid, peripapillary atrophy (1)   2.13 Retina and retinal nerve fibre layer (14)   2.14 Optic disc (16)   2.15 Optic nerve (0)   2.16 Chiasma and retrochiasmal central nervous system (0)   2.17 Stem cells (0)   2.20 Other (0) 3 Laboratory methods (9)   3.1 Microscopy (0)   3.2 Electron microscopy (3)   3.3 Immunohistochemistry (1)   3.4 Molecular genetics (1)     3.4.1 Linkage studies (0)     3.4.2 Gene studies (0)   3.5 Molecular biology incl. SiRNA (0)   3.6 Cellular biology (0)   3.7 Biochemistry (0)   3.8 Pharmacology (0)   3.9 Pathophysiology (0)   3.10 Immunobiology (0)   3.11 Pharmacogenetics (0)   3.12 Proteomics (0)   3.13 In vivo imaging (0)     3.13.1 Laser Scanning (0)       3.13.1.1 Confocal Scanning Laser Ophthalmoscopy (0)       3.13.1.2 Confocal Scanning Laser Polarimetry (0)     3.13.2 Optical Coherence Tomography (0)       3.13.2.1 Anterior Segment (0)       3.13.2.2 Posterior Segment (0)     3.13.3 RGC Imaging (0)     3.13.4 Other (0)   3.20 Other (0) 4 Tissue culture of ocular cells (3) 5 Experimental glaucoma; animal models (16)   5.1 Rodent (0)   5.2 Primates (0)   5.3 Other (0) 6 Clinical examination methods (1)   6.1 Intraocular pressure measurement; factors affecting IOP (15)     6.1.1 Devices, techniques (0)     6.1.2 Fluctuation, circadian rhythms (0)     6.1.3 Factors affecting IOP (0)   6.2 Tonography, aqueous flow measurement (see also 2.6) (0)   6.3 Biomicroscopy (slitlamp) (0)     6.3.1 Anterior segment (0)     6.3.2 Posterior segment (0)   6.4 Gonioscopy (0)   6.5 Ophthalmoscopy (0)   6.6 Visual field examination and other visual function tests (1)     6.6.1 Conventional manual (1)     6.6.2 Automated (2)     6.6.3 Special methods (e.g. color, contrast, SWAP etc.) (20)   6.7 Electro-ophthalmodiagnosis (6)   6.8 Photography (0)     6.8.1 Anterior segment (1)     6.8.2 Posterior segment (3)   6.9 Computerized image analysis (1)     6.9.1 Laser scanning (9)       6.9.1.1 Confocal Scanning Laser Ophthalmoscopy (0)       6.9.1.2 Confocal Scanning Laser Polarimetry (0)     6.9.2 Optical coherence tomography (5)       6.9.2.1 Anterior (0)       6.9.2.2 Posterior (0)     6.9.5 Other (1)   6.10 Fluorescein (ICG) angiography (0)     6.10.1 Anterior segment (0)     6.10.2 Posterior segment (0)   6.11 Bloodflow measurements (15)   6.12 Ultrasonography and ultrasound biomicroscopy (6)   6.13 Provocative tests (1)   6.19 Telemedicine (0)   6.20 Progression (1)   6.30 Other (0) 8 Refractive errors in relation to glaucoma (1)   8.1 Myopia (3)   8.2 Hypermetropia (0)   8.3 Contact lenses (0)   8.4 Refractive surgical procedures (2)   8.5 Other (0) 9 Clinical forms of glaucomas (0)   9.1 Developmental glaucomas (0)     9.1.1 Congenital glaucoma, Buphthalmos (1)     9.1.2 Juvenile glaucoma (1)     9.1.3 Syndromes of Axenfeld, Rieger, Peters, aniridia (3)     9.1.4 Other (0)   9.2 Primary open angle glaucomas (0)     9.2.1 Ocular hypertension (1)     9.2.2 Other risk factors for glaucoma (5)     9.2.3 Open angle glaucoma with elevated IOP (2)     9.2.4 Normal pressure glaucoma (5)   9.3 Primary angle closure glaucomas (0)     9.3.1 Acute primary angle closure glaucoma (pupillary block) (7)     9.3.2 Chronic primary angle closure glaucoma (pupillary block) (2)     9.3.3 Plateau iris syndrome (0)     9.3.4 Primary angle closure suspect (0)     9.3.5 Primary angle closure (0)     9.3.10 Other (1)   9.4 Glaucomas associated with other ocular and systemic disorders (0)     9.4.1 Steroid-induced glaucoma (2)     9.4.2 Glaucomas associated with disorders of the cornea, conjunctiva, sclera (0)       9.4.2.1 Iridocorneal endothelial syndrome (ICE, incl. irisatrophy) (0)       9.4.2.2 Posterior polymorphous dystrophy (0)       9.4.2.3 Fuchs' endothelial dystrophy (0)       9.4.2.5 Other (0)     9.4.3 Glaucomas associated with disorders of the iris and ciliary body (0)       9.4.3.1 Pigmentary glaucoma (0)       9.4.3.5 Other (0)     9.4.4 Glaucomas associated with disorders of the lens (1)       9.4.4.1 Exfoliation syndrome (7)       9.4.4.2 Glaucomas associated with cataracts (0)       9.4.4.3 Glaucomas associated with lens dislocation (0)       9.4.4.5 Other (0)     9.4.5 Glaucomas associated with disorders of the retina, choroid and vitreous (0)       9.4.5.1 Neovascular glaucoma (3)       9.4.5.5 Other (0)     9.4.6 Glaucomas associated with inflammation, uveitis (5)     9.4.7 Glaucomas associated with ocular trauma (0)     9.4.8 Glaucomas associated with intraocular tumors (0)     9.4.9 Glaucomas associated with elevated episcleral venous pressure (0)       9.4.10 Glaucomas associated with hemorrhage (0)     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 (0)       9.4.11.3 Epithelial, fibrous, and endothelial proliferation (0)       9.4.11.4 Glaucomas associated with corneal surgery (2)       9.4.11.5 Glaucomas associated with vitreoretinal surgery (3)     9.4.15 Glaucoma in relation to systemic disease (6)     9.4.20 Other (0) 10 Differential diagnosis e.g. anterior and posterior ischemic optic neuropathy (7) 11 Medical treatment (0)   11.1 General management, indication (9)   11.2 Cholinergic drugs (0)   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 (16)     11.3.5 Other (0)   11.4 Prostaglandins (24)   11.5 Carbonic anhydrase inhibitors (0)     11.5.1 Systemic (0)     11.5.2 Topical (8)   11.6 Osmotic treatment (0)   11.7 Treatment of bloodflow (1)   11.8 Neuroprotection (4)   11.9 Gene therapy (1)   11.13 Combination therapy (0)     11.13.1 Betablocker and pilocarpine (0)     11.13.2 Betablocker and carbon anhydrase inhibitor (0)     11.13.3 Betablocker and brimonidine (0)     11.13.4 Betablocker and prostaglandin (0)     11.13.5 Other (0)   11.14 Investigational drugs; pharmacological experiments (7)   11.15 Other drugs in relation to glaucoma (2)   11.16 Vehicles, delivery systems, pharmacokinetics, formulation (0)   11.17 Cooperation with medical therapy e.g. persistency, compliance, adherence (0)   11.20 Other (0) 12 Surgical treatment (0)   12.1 General management, indication (2)   12.2 Laser iridotomy (1)   12.3 Laser iridoplasty (2)   12.4 Laser trabeculoplasty and other laser treatment of the angle (2)   12.7 Surgical iridectomy (0)   12.8 Filtering surgery (2)     12.8.1 Without tube implant (6)     12.8.2 With tube implant or other drainage devices (9)     12.8.3 Non-perforating (6)     12.8.4 Using laser (1)     12.8.5 Other (0)     12.8.10 Woundhealing antifibrosis (7)     12.8.11 Complications, endophthalmitis (8)   12.9 Trabeculotomy, goniotomy (3)   12.10 Cyclodestruction (4)   12.11 Cyclodialysis (0)   12.12 Cataract extraction (0)     12.12.1 Intracapsular (0)     12.12.2 Extracapsular (1)     12.12.3 Phacoemulsification (9)   12.14 Combined cataract extraction and glaucoma surgery (0)     12.14.1 Intracapsular (0)     12.14.2 Extracapsular (1)     12.14.3 Phacoemulsification (9)   12.15 Capsulotomy (0)   12.16 Vitrectomy (0)   12.17 Anesthesia (6)   12.20 Other (4) 13 Therapeutic prognosis and outcome (0)   13.1 Prognostic factors (0)   13.2 Outcome (0)     13.2.1 IOP (0)     13.2.2 Visual field (0)       13.2.2.1 Progression (0)       13.2.2.2 Improvement (0)     13.2.3 Other (0) 14 Costing studies; pharmacoeconomics (4) 15 Miscellaneous (4)

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Abstract #8286 Published in IGR 4-3

Intraocular pressure measurement after hyperopic LASIK

Wang X; Shen J; McCulley JP; Bowman RW; Petroll WM; Cavanagh HD
CLAO Journal 2002; 28: 136-139

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PURPOSE: Previous studies have shown that Goldmann applanation tonometry (GAT) underestimates intraocular pressure (IOP) following photorefractive keratometry (PRK) and myopic laser in situ keratomileusis (LASIK). The purpose of this study was to evaluate the reliability of intraocular pressure (IOP) measurements by Goldmann applanation tonometry and pneumotonometry (PT) after hyperopic LASIK. METHODS: The IOPs of 20 eyes of 15 patients who underwent hyperopia LASIK were prospectively evaluated. Central and peripheral IOP were measured with GAT and PT, and central and peripheral corneal thicknesses were measured with ultrasonographic pachymetry. Patients were evaluated preoperatively and at 12 months postoperatively. RESULTS: Postoperative GAT measurements of IOP made from the central (13.1 ± 2.7 mmHg) and peripheral (13.9 ± 3.3 mmHg) corneal areas were significantly lower (p < 0.001) than central IOP measured preoperatively (17.0 ± 2.5 mmHg). Postoperative PT measurements from the central (17.4 ± 3.2 mmHg) and peripheral (17.6 ± 2.9 mmHg) corneal areas were slightly lower than preoperative central IOP (18.4 ± 2.4 mmHg), but not statistically significant. There were no significant differences between central and peripheral IOP measurements using either method. CONCLUSION: The data demonstrate that GAT may underestimate IOP measurement, following hyperopic LASIK.

X. Wang, MD, Department of Ophthalmology, The University of Texas Southwestern Medical Center at Dallas, TX, 75390-9057, USA

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Classification:

6.1 Intraocular pressure measurement; factors affecting IOP (Part of: 6 Clinical examination methods)
8.4 Refractive surgical procedures (Part of: 8 Refractive errors in relation to glaucoma)

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