I recently purchased contacts, the BC is 8.3, is it larger or smaller than 8.5? not the number the actaul size

Question

I recently purchased contacts, the BC is 8.3, is it larger or smaller than 8.5? not the number the actaul size

Answer 1

Smaller. Just means the lens is rounder.

Answer 2

the dia.. is the "size"  the BC or base curve is the steepness of the lens.  there is not too much difference between 8.3 and 8.5 but 8.3 is steeper

Answer 3

hate to be too picky here, but 8.3 is NOT "smaller" than 8.5.  its STEEPER.  thats a shape difference, not a SIZE difference.

8.3 is STEEPER than 8.5.

8.5 is FLATTER than 8.3

Answer 4

The radius of curvature is shorter, so yes they are smaller.

Answer 5

8.3 BC is smaller than 8.5 which means the lens has a tighter curve to it