ryu7171
Answered

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what types of lens would work best to help a person who has trouble seeing small letters ​

Sagot :

krill1

Explanation:

The need for some type of vision correction is very common. Common vision defects are easy to understand, and some are simple to correct. Figure 1 illustrates two common vision defects. Nearsightedness, or myopia, is the inability to see distant objects clearly while close objects are clear. The eye overconverges the nearly parallel rays from a distant object, and the rays cross in front of the retina. More divergent rays from a close object are converged on the retina for a clear image. The distance to the farthest object that can be seen clearly is called the far point of the eye (normally infinity). Farsightedness, or hyperopia, is the inability to see close objects clearly while distant objects may be clear. A farsighted eye does not converge sufficient rays from a close object to make the rays meet on the retina. Less diverging rays from a distant object can be converged for a clear image. The distance to the closest object that can be seen clearly is called the near point of the eye (normally 25 cm).

misscheska

TYPES OF LENS

Eyeglasses are used to address eyesight issues. Eyeglasses can help you see clearly at a distance or close up if you have problems seeing well. They make it easier to view items from afar more clearly and sharply.

The way light concentrates on the retina causes the majority of vision impairments. The retina is located near the optic nerve in the back of the eye. The lens of the eye transmits light to the retina, which turns it into electrical signals that are sent to the brain. The visuals we perceive are the result of this process. Eyeglasses aid in the proper placement of light on the retina.

A form of single-vision lens is a pair of reading eyeglasses. When reading, people with presbyopia frequently see objects in the distance clearly but have problems seeing the words. You can benefit from reading eyeglasses. You can typically buy them over the counter at a pharmacy or bookstore, but if you receive a prescription from a doctor, you'll get a better lens. If the prescriptions for the right and left eyes are different, over-the-counter readers are useless. Check with your eye doctor first to check if you can safely use readers before attempting to use them.

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