Optical bench
Purpose
To simulate and correct eyesight defects such as:
Myopia
Hyperopia
Astigmatism
Myopia
is simulated by moving the screen further from the lens
Hyperopia
Is simulated by moving the screen closer to the lens
Astigmatism
Is simulated by adding a cylindrical lens to distort the image
Thin lens equation
1 1 1
_ = _ - _
f x1 x2