In order of appearance:Nearsighted eye - eyeball too long, so images form in front of retina (myopia)Farsighted eye - eyeball too short, so images form "behind" retina (hyperopia)Regular eyeCamera optics
See also:http://www.passmyexams.co.uk/GCSE/physics/concave-lense-convex-lense.html
Nearsighted eyes require concave lenses - this spreads the light out a bit before hitting the actual lens. (-f length)Farsighted eyes require convex lenses - this converges the light a bit before hitting the actual lens. (+f length)
In order of appearance:
ReplyDeleteNearsighted eye - eyeball too long, so images form in front of retina (myopia)
Farsighted eye - eyeball too short, so images form "behind" retina (hyperopia)
Regular eye
Camera optics
See also:
ReplyDeletehttp://www.passmyexams.co.uk/GCSE/physics/concave-lense-convex-lense.html
Nearsighted eyes require concave lenses - this spreads the light out a bit before hitting the actual lens. (-f length)
ReplyDeleteFarsighted eyes require convex lenses - this converges the light a bit before hitting the actual lens. (+f length)