It is possible for a person to determine whether ot not their eyes are focused. This can be determined by visiting an eye doctor, who will look at their eyes through specialized instruments.
It will be right to say that only principles of light microscopy keeps light focused and scatters wavelengths of visible light for the human eye to see.
it is possible to see some constellations without the use of a telescope, but not all
Not with the naked eye, but with a microscope, yes.
Not with the naked human eye. The eye needs at least a little light in order to be able to see. With special equipment, we can measure things like infrared heat and "see" even if there is no light, but that's not really seeing because you're using machines instead of your eye.
Ofcourse,It is not possible with a naked eye but you can sure see it when you do with a hi fi telescope.
It make it possible to see things that are too small to see with the naked, unaided eye.
Yes, the eye could be possible but it would be a birth defect and doctors would then remove the 3rd eye . The eye probably would be able to see but it is still possible but only as a birth defect.
There are many factors that contribute to human sight. The lens is used to refract light to be focused on the retina (allowing you to see). It's similar to a camera lens. Removing the lens would be detrimental to eyesight and the eye would not definitely not work properly. As for being able to see ever again, there are surgeries that can correct almost every part of the eye, including the lens. So it's possible to see again, just not very likely without the help of the lens to refract light onto the cornea.
A laser is a beam of very strong and focused light. It is possible for this light to damage the retina of your eye permanently, and you will lose all or part of your vision.
If you are talking about an eye transplant or re-attching an eye to someone else, you are OUT of luck. It isn't possible and it will always be. As you can see, the eyeball is connected to the brain. Once you cut the vein connecting the eye to the brain, the brain gives it off and the eye is disabled. If you recconect the eye back to the brain, it wont work because the eye is disabled and unable to see. You cannot see anything. Hope this helps.
With the naked eye or any normal domestic aid - no.
If you "see eye to eye," then you both see the same thing, or you agree. If you don't see eye to eye, then you don't agree.