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ORIGINAL ARTICLE
Year : 2016  |  Volume : 64  |  Issue : 2  |  Page : 136-139

Anterior and posterior segment parameters measured with Fourier domain optical coherence tomography in photopic and scotopic conditions


1 Discipline of Optometry, University of KwaZulu-Natal, Durban, South Africa
2 Discipline of Optometry, School of Health Sciences, University of KwaZulu-Natal, Durban, South Africa

Correspondence Address:
D r. Rekha Hansraj
Discipline of Optometry, School of Health Sciences , University of KwaZulu-Natal, Private Bag X54001, Durban 4000
South Africa
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0301-4738.179726

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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,


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