0
As people age, the lens hardens and changes shape less easily.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
Explain how focussing occurs in a microscope?
To focus the image, you have to move the object you are studying closer to or farther from the objective lens.
What is the property of image formed by concave lens?
Image formed by a concave lens or a diverging lens is virtual,upright and smaller than the object.It is used by short sighted people.
How does a concave lens correct nearsightedness?
The eye lens may become too thick & its focal length is reduced. the ciliary muscles are not able to relax sufficiently to make the eye lens thin when viewing distant objects. So, they are unable to increase the focal length of the lens & the image is formed before retina. Since short sightedness occurs due to excessive convergence of light rays by the eye lens, it can be corrected by using a diverging lens, i.e, a concave lens. A properly chosen focal length of a concave lens compensates the extra convergence of the eye lens thus, removing the defect. The scientific name of short sightedness is myopia.
What uses concave lens?
Glasses for short sighted people.
Image of object formed by a lens on the screen is not in sharp focus suggest a method to get clear focusing of the image on the screen without disturbing the position of the object lens or the screen?
You could insert a second lens in the focal path, between the object and the first lens. The second lens can be designed (or moved) to focus the image on the screen. This is the same function that eyeglasses do for people with poor vision. The second lens, the eyeglasses, are inserted between the viewed object and the lens of the eyes. The second lens is designed to correct the distortion of the eye lens, thus creating an in-focus object on the "screens" of the eyes.
At what age does the hardening of the eye's lens usually occur?
This generally occurs around the age of 40 and continues until about age 65.
What changes occur in the lens's protein during the aging process?
As people age, degenerative changes in the lens's proteins occur.
How does light go through a lens?
Light goes in the lens, refraction occurs, and the light exits the lens.
What is meant by the term 'lens flare'?
A lens flair occurs in photography when unwanted light shines into the camera and shows up in a picture. This occurs often when shooting pictures with the sun in the background.
What age is Emphysema seen in?
Emphysema occurs more often in people 65 years of age and older
Why do humans eyes have to blink?
The lens of the eye needs to stay moist, so blinking replenishes that dryness of the lens. Blinking also occurs in the event of debris getting on the lens of the eye.
What is the medical term meaning without a lens?
The medical term for without a lens is aphakia. This condition occurs when the natural lens of the eye is either absent or surgically removed.
Is there right age to wear contact lens?
at least 7 years of age
What is the medical term for impairment of vision due to old age?
The medical term for impairment of vision due to old age is presbyopia. This condition typically occurs around the age of 40 and is a natural part of aging where the lens of the eye stiffens, leading to difficulty focusing on close objects.
What happens to lens cells as you age?
they weaken and detoriate
How is vision impaired when a cataract forms on the outer edges or side of the lens?
A cataract that occurs on the outer edges or side of the lens will create less of a visual problem.
What causes PSC cataracts?
located within the rear surface of the lens. This common type of cataract occurs in the elderly as "senile cataract" or at any age after chronic intraocular inflammations or prolonged steroid drug use.
