Question

Name the condition of the eye which causes a round object to appear as if they were oval?
A) Astigmatism
B) Presbyopia
C) Myopia
D) Retinitis

Answer 1

Hint: The eye is one of the most essential and complex sense organs that we humans have. It aids in the visualisation of objects, as well as light, colour, and depth perception. Furthermore, these sense organs are identical to cameras in that they assist us in seeing objects when light from the outside reaches them.

Complete answer:
Astigmatism is a vision condition caused by a misalignment of the cornea's form. Astigmatism is a condition in which the cornea, or front surface of the skin, has an irregular curve. This can cause changes in how light refracts or passes through your retina. As a result, vision becomes hazy, blurry, or distorted.

Some issues with the way light travels through your retina include farsightedness and nearsightedness. Hyperopia is the medical term for nearsightedness. Myopia is the medical term for nearsightedness. Corneal and lenticular astigmatism are the two most common forms of astigmatism. When the cornea is misshapen, you have corneal astigmatism. When the lens is misshapen, it causes lenticular astigmatism.

Astigmatism occurs when the curves on the front surface of your eye's cornea or the lens inside your eye are misaligned. Instead of a single curve like a round disc, the surface is egg-shaped. This causes blurred vision at all distances.

Presbyopia is a physiological insufficiency of accommodation that occurs as the eye ages, resulting in a deterioration of the ability to focus clearly on near objects. The inability to read the small print, the need to keep reading materials further away, headaches, and eyestrain are all symptoms.

Retinitis is an infection of the retina in the eye that can result in permanent damage and blindness. The retina is the "sensing" tissue of the eye. Retinitis may be brought about by a variety of infectious agents.

Hence the correct answer is option (A) i.e, Astigmatism.

Note: Causes and Risk factors of Astigmatism :
- It is normally present from birth and is hereditary.
- It's possible that it'll grow after an eye injury or surgery.
- It may be caused by keratoconus, a relatively uncommon disorder in which the cornea thins and becomes cone-shaped over time.
- It has the potential to decrease or increase over time.

The examination of Astigmatism includes
1.Visual acuity
2.Keratometry/topography
3.Refraction