Retinal oxygen saturation in retinitis pigmentosa and macular dystrophies in asian-Indian eyes.

Abstract:

PURPOSE:To study the oxygen-saturation profiles in RP and macular dystrophies and compare them with age-matched healthy controls. METHODS:In a cross-sectional prospective study, 62 subjects with RP, 23 with macular dystrophies, and 78 controls were enrolled, and retinal oximetry was performed with the Oxymap T1 retinal oximeter. The images were analyzed for oxygen saturation and diameter of retinal vessels. RESULTS:All parameters showed a significant difference among the three groups. Patients with RP showed significantly lower diameters (98.4 μm and 136.9 μm arteriolar and venous) (P < 0.001), higher saturations (102.3% and 59.1%) (P < 0.001; 0.06), and higher arterio-venous saturation difference (AVSD) (43%) (P < 0.001) compared with the other two groups. Macular dystrophies showed higher global arteriolar values (96.7%) and AVSD (41.6%) but comparable venous values (54.9%) to the control group (90.6%, 57.4%, and 33.3%). CONCLUSIONS:Oximetry is sensitive in quantifying hemodynamic changes in retinal dystrophies. It is still unclear whether these hemodynamic changes are a cause or a result of the disease process.

authors

Battu R,Mohan A,Khanna A,Kumar A,Shetty R

doi

10.1167/iovs.14-15993

subject

Has Abstract

pub_date

2015-05-01 00:00:00

pages

2798-802

issue

5

eissn

0146-0404

issn

1552-5783

pii

2290244

journal_volume

56

pub_type

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