Update README.md

README.md

@@ -143,9 +143,9 @@ with torch.no_grad():
 ### Eye Center Detection
 
 Uses a gradient-based radial symmetry approach:
-- Computes Sobel gradients
-- Weights pixels by darkness (fundus is typically darker than background)
-- Finds center where gradients point inward radially
+- Computes Sobel gradients to detect edges
+- Finds circular boundaries where gradients point inward radially
+- Weights by edge strength and proximity to dark regions (background)
 - Uses soft argmax for sub-pixel accuracy
 
 ### CLAHE Implementation