Can no longer see well

The eyes are able to receive light stimuli and transmit these stimuli in the form of impulses via the optic nerve to the brain. So we can see. Sometimes the eye does not catch light and images properly, and we can therefore see less. Below are a number of common abnormalities of the eye.

Imaging

The eyeball is filled with transparent structures that, together with the cornea, project a clear image onto the retina. They are the aqueous humor, the lens and the vitreous humor. They ensure that two slightly different, inverted and greatly reduced images are formed on the retina. The two images, one on each retina, are processed in the brain into one image. This allows us to accurately estimate depth and distances.

No clear vision (presbyopia)

The eye consists of several parts, such as the cornea, the lens and the retina. The eye lens can adjust its strength in a positive way (accommodate), this accommodation happens automatically and ensures that the eye can see clearly from near to far. Due to the normal aging process, the eye’s ability to accommodate decreases. As a result, the eye lens can no longer adjust its strength sufficiently to image nearby objects on the retina. This condition is called presbyopia, the vision is not sharp. This discomfort can easily be remedied with glasses or lenses with a positive lens (+).

Nearsighted (myopia)

Here too, the cause lies in accommodation. With myopia (near-sightedness), the object you are looking at remains blurred. Technically, it is not imaged on the retina, but in front of it. With the help of a negative lens (-), the nearby object can be seen razor sharp again.

Farsighted (hyperopia)

Here too, accommodation plays a role. With hyperopia (farsightedness), the object you are looking at is perceived blurred because it is imaged behind the retina. Young people usually have sufficient capacity to correct this error. Older people, with reduced ability to accommodate, can also see clearly from a distance with the help of a positive lens (+).

Cataracts

As you get older, the lens becomes less clear. This can happen because some of the proteins that make up the lens clump together. This can make parts of the lens cloudy. Cataract is an eye disease in which the lens changes very gradually. The lens transmits less light and visual acuity also decreases. In addition, people are more likely to suffer from sunlight or daylight due to the scattering of light. If cataracts are more advanced, the ophthalmologist can remove them surgically. Good management of the complaints is important, so that you can be referred to a specialist at the right time.

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