This elasticity allows the lens to focus on both near and far objects.
Presbyopia
Presbyopia
The flexibility and elasticity of the lens decrease as you age, leading to a condition known as presbyopia. This makes it harder for the lens to focus on close-up objects, resulting in the need for reading glasses or bifocals in many individuals.
the lerns i you eyes are the contct lens it help you see at any way you wan it
which organisms have more than one lens in their eyes ?
In the eyes.
retina
A contact lens sits on top of the eye and can reduce the amount of oxygen which gets to the eye. In the past contact lens materials have been relativley poor at allowing oxygen through the lens. However new materials are highly oxygen permeable and allow comfortable healthy contact lens wear. Not all lenses allow healthy wear and it is best to ask your optometrist about the best type of lens for your eye and regular checks to ensure ocular health
Because the lens has been focused depending on the available light. if you enter a darker room, your eyes have to re-adjust to allow more light through them.
The eye has the amazing ability to zoom in and zoom out depending on where we are looking it. This is due to its elasticity. Loss of elasticity can cause a common defect found in people over 40 years called presbyopia. It is the inability to focus on near objects due to loss in elasticity of the crystalline lens. Although I haven't heard of a condition where the elasticity has reached zero, I'm assuming the person would not be able to vary his gaze.
Hemianopia Presbyopia
It increases because the lens hardens and makes it much more difficult for the eye muscles to change the shape of the lens It increases because the lens hardens and makes it much more difficult for the eye muscles to change the shape of the lens