The Conjunctiva in Normal Tension Glaucoma Patients is Thinner Than in Primary Open-Angle Glaucoma Patients: A Comparative Histologic Study
| Autor: | Rita Van Ginderdeuren, Luís Abegão Pinto, Evelien Vandewalle, Thierry Zeyen, Ingeborg Stalmans |
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| Rok vydání: | 2016 |
| Předmět: |
Male
Intraocular pressure Pathology medicine.medical_specialty genetic structures Open angle glaucoma medicine.medical_treatment Biopsy Glaucoma Trabeculectomy 03 medical and health sciences symbols.namesake Tonometry Ocular 0302 clinical medicine Normal tension glaucoma Ophthalmology medicine Humans Low Tension Glaucoma Prospective Studies Fisher's exact test Intraocular Pressure Aged Aged 80 and over medicine.diagnostic_test business.industry Organ Size medicine.disease eye diseases 030221 ophthalmology & optometry symbols Female sense organs business Conjunctiva 030217 neurology & neurosurgery Glaucoma Open-Angle |
| Zdroj: | Journal of glaucoma. 25(5) |
| ISSN: | 1536-481X |
| Popis: | PURPOSE To compare histologically the thickness of conjunctival specimens of normal tension glaucoma (NTG) patients with primary open-angle glaucoma (POAG) patients. MATERIALS AND METHODS In this prospective study, 54 patients scheduled for trabeculectomy were categorized into NTG and POAG based on their maximum untreated intraocular pressure at any time (IOPmax) as measured by Goldmann applanation tonometry. Sixteen patients with NTG (IOPmax≤21 mm Hg) and 36 patients with high tension POAG (IOPmax>21 mm Hg) were included in the study. Biopsies were taken from the superior bulbar conjunctiva during trabeculectomy. The specimens were fixed in formalin, embedded in methacrylate, histologically sectioned, stained with toluidine blue, and analyzed with a light microscope. The stromal conjunctival thickness (CT) was measured in a standardized way and compared between the 2 groups. Intergroup comparisons were performed using the Mann-Whitney U test for continuous variables and the Fisher exact test for categorical variables. The correlation between the central cornea thickness (CCT) and the CT was investigated by the Spearman test. RESULTS The stromal CT was significantly thinner in NTG compared with POAG (64±31 vs. 103±44 µm, respectively; P=0.002). Stromal CT of the whole group was positively correlated with IOPmax (r=0.41; P=0.002; 95% confidence interval, 0.15-0.62) but not with central cornea thickness (r=-0.005; P=0.97; 95% confidence interval, -0.28 to 0.27). CONCLUSIONS The conjunctiva in patients with NTG was thinner than in POAG patients. This finding is an additional feature in the pattern of thinner ocular structures in patients with NTG. |
| Databáze: | OpenAIRE |
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