From left to right, there is a diverging (biconcave) lens, a converging (biconvex) lens and two triangular prisms. The rays start parallel and diverge after passing through the first lens, then converge after passing through the second....

Contact Lens

Human eye - CU blue eye, dilated pupil contracts, eyelid closes

Human eye - CU blue eye, dilated pupil contracts, eyelid closes

Human eye - CU blue eye, dilated pupil contracts, eyelid closes

Contact lens consultation

Eyeglasses lens edger.

Human eye - CU brown eye, dilated pupil contracts, eyelid closes

Contact Lens Removal

inserting Contact Lens

4k Fiber optics with dolly shot: Sony a7r mark2, lens 100 macro L

Contact lens macro

4k Fiber optics with dolly shot: Sony a7r mark2, lens 100 macro L

4k Fiber optics with dolly shot: Sony a7r mark2, lens 100 macro L

4k Fiber optics with dolly shot: Sony a7r mark2, lens 100 macro L

Microscope

Visual description of how human eyes work

4k Fiber optics with dolly shot: Sony a7r mark2, lens 100 macro L

Optician selling glasses at the optics

Human blue eye macro shot. Close-up animation of eye blinking.

Animation of a divergent biconcave lens, showing its effect on parallel rays of light. Light is refracted when it passes from air into the more dense medium of the glass lens, slowing it down and changing the angle of its path

Human Eye - Eyelids and eyelashes protecting out of focus eye

Shifting geometric shapes

Shifting blue geometric shapes