Correlation between visual acuity measured with ETDRS chart at different levels of contrast (in %) and macular structural measurements (thickness and volume) in patients with Parkinson's disease
| Macular thickness | p Value | Macular volume | p Value | |
|---|---|---|---|---|
| VA ETDRS 100 | −0.765 | 0.006 | −0.761 | 0.007 |
| VA ETDRS 1.25 | −0.718 | 0.013 | −0.715 | 0.013 |
| VA ETDRS 2.50 | −0.738 | 0.010 | −0.729 | 0.011 |
Correlation data in bold type are statistically significant (p<0.05). ETDRS, Early Treatment Diabetic Retinopathy Study; VA, visual acuity.