Anterior Segment Characteristics of Keratoconus Eyes Using Scheimpflug-Placido Topography
Journal Title: Journal of Clinical Research and Ophthalmology - Year 2016, Vol 3, Issue 1
Abstract
Purpose: To assess anterior segment parameters of keratoconus (KC) eyes at different stages of the disease using Scheimpflug-placido topography (Sirius, CSO, Italy) in a sample of the southern Egyptian population. Methods: retrospective study of 400eyes of different grades of keratoconus along with 50 normal eyes as a control group were assessed for the following parameters: corneal thickness at apex (CCT), thinnest corneal thickness (TCT), anterior chamber depth (ACD), corneal volume (CV), corneal keratometry, corneal asphericity (Q), corneal elevation (both anterior and posterior) with aspherotoric surface as a reference, total root mean square (RMS), RMS Coma, RMS spherical aberration (SA), RMS Astigmatism, , Baiocchi Calossi Versaci front index (BCVf) and BCV back index (BCVb). They underwent Sirius Schemipflug placid topographer evaluation. Results: eyes were subdivided into: normal group (50 eyes), suspect KC (82eyes), grade 1 KC (80eyes), grade 2 KC (142eyes), and grade 3 KC (96eyes). The thinnest corneal thickness corneal thickness at apex and posterior corneal elevation were significantly different in all comparison groups. ACD values showed inconsistent differences between groups. Corneal volume was proved to be significant in comparing normal vs suspect KC group as well as in normal vs mild KC and normal vs moderate KC. Total RMS, RMS coma and BCV f and BCV b were significant for most groups Conclusion: Corneal thickness and high order aberrations proved to be able to diagnose different grades of keratoconus while corneal volume did not prove to have a significant role.
Authors and Affiliations
Marian Fathy, Mohammed H El Agooz, Alahmady H Samman, Engy M Mostafa
Keywords
Related Articles
- EP ID EP231020
- DOI 10.17352/2455-1414.000027
- Views 81
- Downloads 0
Relationship of Serum HbA1c and Fasting Serum Lipids with Central Macular Thickness in Patients with Type 2 Diabetes Mellitus
Background: Diabetic retinopathy, the most common retinal vascular disease, is the leading cause of new-blindness in adults during the third through sixth decades of life. Purpose: To determine the correlation between ce...
Secondary Syphilis Presenting as Optic Neuritis in an Immunocompetent Patient: Case Report
Purpose: The purpose of this report is to present a case of optic neuropathy as a manifestation of secondary syphilis in an HIV-negative patient. Methods: We describe a case of gradual loss of visual acuity in the left e...
Corneal Diabetes: Where to Next?
Diabetes mellitus (DM) or better known as simply diabetes is a group of metabolic diseases in which high blood sugar levels are maintained over a prolonged period. Long term complications include but not limited to heart...
Bilateral Retrobulbar HIV Optic Neuritis
Purpose: The purpose of this report is to present a case of bilateral HIV optic neuropathy. Methods: We describe a case of completely loss of visual acuity in the left eye (LE) and partially in the right eye (RE) in a 25...
The Association of Dry Eye Symptoms with Socioeconomic Factors and Quality of Life
Purpose: Dry eye is a common condition with significant morbidity and socioeconomic burden. The associated demographic factors that worsen utility in dry eye patients were not known. There were many questionnaire instrum...