they weaken and detoriate
membranes "wear out" and the cells become damaged
A fisheye lens IS a wide angle lens
light bends when it hits the lens....this is called refraction
sh@@ happens
Posterior capsule opacification occurs when residual lens epithelial cells proliferate and migrate to the posterior capsule of the lens after cataract surgery. These cells can differentiate into lens fiber cells, leading to the formation of scar tissue or fibrotic plaques that cloud the vision.
When a lens loses its elasticity with age, it becomes less able to change shape and refract light properly. This can result in a condition known as presbyopia, where it becomes difficult to focus on close objects. In some cases, this can be corrected with reading glasses or contact lenses.
When a human being is aging, their muscle cells also tend to age. Because of this, the muscle cells become weaker and the body is more prone to injury.
The muscles around the eye lens attempt to change its focal length (done subconsciously). Sometimes, often due to age, this is not adequate and people resort to wearing glasses to adapt the neutral focus position of the eye.
When the curvature of a lens is larger, the focal point moves closer to the lens. This means the lens has a shorter focal length and will converge light rays at a point closer to the lens.
at least 7 years of age
No, the closer an object is to the lens, the more the spherical it is.
As we age, the proteins in the lens of the eye can degrade and become less flexible, leading to a condition called presbyopia. This results in difficulty focusing on close objects and can make the lens feel like it is no longer as firm or resistant to changes in shape. Age-related changes in the muscle that surrounds the lens can also affect its ability to change shape for focusing, causing the lens to feel looser.