Videos
Short (Oops, near) Sightedness
199
Designing My Glasses
122
Far Sightedness
127
Designing My Friend's Glasses
136
Grandpa's Problems
70
Astigmatism
107
Lenses Part 1
142
Lenses Part 2
59
Lenses Part 3
253
Lenses Part 4
114
Problems Part 1
50
Problems Part 2
66
Problems Part 3
61
Problems Part 4
52
Problems Part 5
48