"Both sides"?
edit"Formally, it is a bi-convex spherical lens with the same radius of curvature on both sides, and diameter equal to twice the radius of curvature". Formally, it is a ball. The above description is just silly. Why did the editor feel the need to state that diameter is twice the radius of curvature? Isn't that true by definition? 162.246.139.210 (talk) 16:26, 6 August 2024 (UTC)
- When analyzing lenses, one considers the front and back surface separately. The point of that line is that you can analyze a ball lens the same way as any other lens. --Srleffler (talk) 05:02, 11 August 2024 (UTC)