TY - JOUR A1 - Rampersad, Nishanee A1 - Hansraj, Rekha T1 - Anterior and posterior segment parameters measured with Fourier domain optical coherence tomography in photopic and scotopic conditions Y1 - 2016/2/1 JF - Indian Journal of Ophthalmology JO - Indian J Ophthalmol SP - 136 EP - 139 VL - 64 IS - 2 UR - https://journals.lww.com/ijo/pages/default.aspx/article.asp?issn=0301-4738;year=2016;volume=64;issue=2;spage=136;epage=139;aulast=Rampersad DO - 10.4103/0301-4738.179726 N2 - Purpose: To compare anterior and posterior segment parameters measured with the iVue-100 optical coherence tomography (OCT) in photopic and scotopic conditions. Methods: Central and peripheral corneal thickness, retinal nerve fiber layer and macula thickness were measured using the iVue-100 OCT in 47 healthy individuals at a higher education institution in photopic (958 lux) and scotopic (0.03 lux) conditions. Results: As the lighting conditions changed from scotopic to photopic, a significant change in pupil size was noted (P < 0.001). However, there was no significant difference in central corneal thickness measurements with this change in surrounding illumination with only the temporal peripheral corneal area showing a significant difference (3.44 μm thinner). No significant differences were found in the retinal nerve fiber layer thickness. A significant decrease in the reading was noted in only the inferior (P = 0.05) and temporal (P = 0.05) inner macula area. Conclusion: Change in the ambient lighting conditions does not result in a clinically significant difference in corneal, retinal nerve fiber layer, and macula thickness when measured with the iVue-100 OCT, ER -