E and C Charts, Sloan Letter, Astigmatism & Vergence Projector Slides

Projector Slides featuring Astigmatism & Vergence. E and C Charts, from 20/400 to 20/200, Sloan Letter from 20/100 to 20/10, Astigmatic Clock Test, Vertical Lines for Vergence from 20/40 to 20/10, Sloan Letter from 20/50 to 20/10, and Astigmatic Blocks.