Why do I see better under water using swimming goggles?
108494
Eyes open under water
63434
Technically, why is the out of focus area blurred more when using a bigger aperture?
86796
Why do waves diffract?
152159
How do our eyes detect light at different frequencies?
44369
Transparency/Masking : See through an Outer Sphere and see Inner Sphere in true colours
20086
Why is the amount of light a lens lets in called the 'lens speed'?
147919
How does this optical illusion work?
108219
Why can I see through my objects?
44178
Why is light invisible?
103685
Can creatures with keen senses such as scent or extra senses such as blindsight 'see' invisible creatures?
118736
Why do the Human-looking Youkai obscure their eyes?
56452
What happens to waves when they hit smaller apertures than their wavelenghts?
37531
Pinhole camera: How "How to See Without Your Glasses" works?
142641
Do Nondetection and Invisibility protect you from True Seeing?
114388
Why doesn't more light bounce off of things in the manner of sound?
14032
Can someone explain to me the concept of atmosphere opacity?
152194
How far can characters see?