Biology · Physics

Vision Defects and Eye Conditions

1,088 Questions

Vision defects and eye conditions questions focus on common visual impairments like myopia, cataracts, and glaucoma. These topics are regularly tested in the general science sections of competitive exams. Solve these questions to learn about optical defects and treatments.

Myopia and hypermetropiaCataracts and risk factorsGlaucoma treatmentsEye infection typesArtificial tears

Vision Defects and Eye Conditions Questions

Multiple choice evs we are special defects of eye disorders of nervous system braille script

Presbyopia is due to

  1. Reduced elasticity at eye lens

  2. Protrusion of cornea

  3. Enlargement of eye ball

  4. Compression of eye ball
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Presbyopia is a condition of consisting of nearsightedness, farsightedness, and astigmatism. The condition is common in old age because of hardening of eye lens which results in focusing of light behind the retina for closely placed objects.

So, the correct answer is 'Reduced elasticity of eye lens'.

Multiple choice evs we are special defects of eye disorders of nervous system braille script

Trachoma is a disease of the __________.

  1. Ear

  2. Larynx

  3. Brain

  4. Eye
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Trachoma is an infectious disease caused by bacterium Chlamydia trachomatis. The infection causes a roughening of the inner surface of the eyelids. ... Untreated, repeated trachoma infections can result in a form of permanent blindness when the eyelids turn inward. So, the correct option is :D" (Eye).

Multiple choice evs we are special defects of eye disorders of nervous system braille script

When the light rays converge at a point in front of the retina and then divert to form a blurred image on it, the defect is known as

  1. Myopia

  2. Hypermetropia

  3. Astigmatism

  4. Presbiopia
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Myopia occurs when the eyeball is too long, relative to the focusing power of the cornea and lens of the eye. This causes light rays to focus at a point in front of the retina, rather than directly on its surface. Nearsightedness also can be caused by the cornea or lens being too curved for the length of the eyeball.

Multiple choice evs we are special defects of eye disorders of nervous system braille script

In old age, lens loses its ability to focus because of loss of elasticity and ability to accomodate called as

  1. Astigmatism

  2. Trachoma

  3. Glaucoma

  4. Presbyopia
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Presbyopia is a condition associated with aging in which the eye exhibits a progressively diminished ability to focus on near objects. Loss of elasticity of the crystalline lens, changes in the lens curvature from continual growth and loss of power of the ciliary muscles may be the cause of presbyopia .

Multiple choice evs we are special defects of eye disorders of nervous system braille script

The lens becomes opaque in

  1. Myopia

  2. Hypermetropia

  3. Astigmatism

  4. Cataract
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A cataract is a common eye condition, where the lens becomes progressively opaque, resulting in blurred vision, incapable of transmitting the light rays and is corrected by surgical replacement of lens with the artificial lens. Thus, the correct answer is option D.

Multiple choice evs we are special defects of eye disorders of nervous system braille script

Recently there was a report on adverse effect of wearing neck tie. Tight neck tie may cause

  1. Glaucoma

  2. Hypertension

  3. Hoarseness of voice

  4. Hyperthyroidism
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tight neck ties constrict the jugular vein. This constriction may raise blood pressure within the eye and cause an increase in intraocular pressure (IOP). The increased IOP may put tight neck tie wearers at risk for developing glaucoma.

Multiple choice evs we are special defects of eye disorders of nervous system braille script

In the following abnormalities of the eye, which one of the following is a serious condition that leads to blindness?

  1. Presbyopia

  2. Myopia

  3. Hypermetropia

  4. Glaucoma

  5. Astigmatism
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Glaucoma is a group of ocular (eye) disorders resulting in optic nerve damage or loss to the field of vision, caused by a pressure buildup of the fluid of the eye. The increased pressure, called as intraocular pressure, can damage the optic nerve, which transmits images to the brain. If damage to the optic nerve from high eye pressure continues, glaucoma will cause permanent loss of vision. Without treatment, glaucoma can cause total permanent blindness within a few years.

Multiple choice evs we are special defects of eye disorders of nervous system braille script

Cataract is a common symptom with the patients who consume .......... for long.

  1. Analgesic drugs

  2. Alcohol based drugs

  3. Steroids

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A cataract is a clouding of the lens in the eye, that affects vision. Most cataracts are related to aging. People with diabetes or those taking high doses of steroid medications have a greater risk of developing subcapsular cataract (the one that occurs at the back of the lens).
Thus, the correct answer is the option (C), 'Steroids'.

Multiple choice evs we are special defects of eye disorders of nervous system braille script

The defective condition of accommodation of the eye in which distant objects are clearly seen but near objects are indistinct is

  1. Astigmatism

  2. Presbyopia

  3. Myopia

  4. Hypermetropia
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hyperopia or hypermetropia, is a refractive error. Ideally, the cornea and lens, the two focusing structures in the eye, focus images directly on the surface of the retina. If the eye is too short, or the focusing power is too weak, the image is focused behind the retina. At the retinal surface, the image is blurred. Thus, the vision, too, is blurred.

So, the correct answer is option D.

Multiple choice evs we are special defects of eye disorders of nervous system braille script

Night blindness is caused due to 

  1. Hypermetropia

  2. Myopia

  3. Defective cornea

  4. Deficiency of rhodopsin in rods
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Rhodopsin serves as a visual purple pigment of rod cells and is responsible for night vision. Rhodopsin deficiency causes night blindness. Myopia is caused by elongation of eyeball while shortening of eyeball causes hypermetropia. The cornea is the transparent anterior window of an outer layer of the eyeball and does not have rods. Thus, the correct answer is option D.

Multiple choice evs we are special defects of eye disorders of nervous system braille script

In old age farsightedness is a defect of eye in man, in which 

  1. Eye ball becomes short

  2. Eye ball becomes elongated

  3. Lens becomes less elastic

  4. Lens become more spherical
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Presbyopia is caused by an age related process. It occurs due to a gradual thickening and loss of flexibility of the natural lens inside the eye. These age related changes occur within the proteins in the lens, making the lens harder and less elastic over time. Age related changes also take place in the muscle fibers surrounding the lens. Changes in the lens curvature progressively cause diminished ability to focus on near objects. 

So, the correct answer is option C.

Multiple choice evs we are special defects of eye disorders of nervous system braille script

When the canal of schlemm is blocked, what condition is developed?

  1. Intraocular pressure is increased

  2. Retina start to damage

  3. Person may become blind

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The canal of Schlemm is a channel in the eye that collects aqueous humor from the eye and moves it into the bloodstream. If the canal is blocked, the pressure in the eye can increase, resulting in glaucoma. Glaucoma is a condition that causes damage to the eye's optic nerve. It is associated with a buildup of pressure inside the eye. The increased pressure, called as intraocular pressure, can damage the optic nerve, which transmits images to the brain. If damage to the optic nerve from high eye pressure continues, glaucoma will cause permanent loss of vision. Thus, the correct answer is option D.

Multiple choice evs we are special defects of eye disorders of nervous system braille script

Name the condition of the eye which causes round objects to appear as though they were oval?

  1. Astigmatism

  2. Presbyopia

  3. Myopia

  4. Retinitis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Astigmatism is a refractive error, meaning it is not an eye disease or eye health problem; it's simply a problem with how the eye focuses light. In an eye with astigmatism, light fails to come to a single focus on the retina to produce clear vision. Instead, multiple focus points occur, either in front of the retina or behind it (or both). Astigmatism usually is caused by an irregularly shaped cornea. Instead of the cornea having a symmetrically round shape. Astigmatism usually causes vision to be blurred or distorted to some degree at all distances. Symptoms of uncorrected astigmatism are eye strain and headaches, especially after reading or other prolonged visual tasks.
So the correct option is 'astigmatism'.
Multiple choice evs we are special defects of eye disorders of nervous system braille script

Cataract is a disease of

  1. Ears

  2. Nose

  3. Eyes

  4. Throat
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cataract is due to clouding of the lens. Due to this, the lenses become opaque and the vision is impaired. In this condition, an operation is needed. Cataract is very common in old age.

Hence, the correct answer is 'Eyes'