Abstract
Purpose
To quantify stereopsis and other visual functions in patients with unilateral branch retinal vein occlusion (BRVO) and to investigate vision-related parameters that affect stereopsis.
Design
Prospective observational study.
Subjects
Forty-five patients undergoing intravitreal ranibizumab (IVR) treatment for unilateral BRVO.
Methods
We examined stereopsis using the Titmus stereo test (TST) and TNO stereotest (TNO), best corrected visual acuity (BCVA), letter contrast sensitivity, severity of metamorphopsia and degree of aniseikonia before and 6 months after IVR.
Main outcome measures
Visual functions that affect stereopsis.
Results
Baseline stereopsis in patients with BRVO was 2.7 ± 0.6 (range, 1.6–3.5) in the TST and 2.8 ± 0.5 (range, 1.8–3.3) in TNO. TST and TNO scores were significantly correlated with BCVA and letter contrast sensitivity at baseline (P < 0.001) but not with other visual functions. IVR treatment significantly improved stereopsis, BCVA, and letter contrast sensitivity. After treatment, TST scores were significantly correlated with BCVA (P < 0.001), letter contrast sensitivity (P < 0.001), and aniseikonia (P < 0.01). TNO scores were significantly correlated with BCVA (P < 0.01) and letter contrast sensitivity (P < 0.01). TST and TNO scores after treatment were significantly correlated with BCVA at baseline (P < 0.01 for both).
Conclusions
Deterioration of stereopsis in patients with BRVO was associated with changes in visual acuity and contrast sensitivity after treatment. Initial visual acuity is a prognostic factor for posttreatment stereopsis.
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Morikawa, S., Okamoto, F., Murakami, T. et al. Visual functions affecting stereopsis in patients with branch retinal vein occlusion. Eye 36, 457–462 (2022). https://doi.org/10.1038/s41433-021-01452-x
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DOI: https://doi.org/10.1038/s41433-021-01452-x
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