Biology · Physics

Vision Defects and Eye Conditions

1,091 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 biology human health and disease drug, tobacco and alcohol consumption addiction and dependence community health and hygiene

Consumption of methanol can result in blindness; Since it

  1. Inhibits neurotransuitter GABA

  2. Is released from retina

  3. Generally damages optic nerve

  4. Is stored in cornea and tear glands
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The consumption of methanol causes 'Toxic Optic Neuropathy' (TON). It is caused when the optic nerve is damaged by toxin which leads to visual impairment. This condition often presents as a painless, progressive, bilateral, symmetrical visual decline with variable optic nerve head damage. So, the correct answer is option C.

Multiple choice physics spectra the electromagnetic spectrum electromagnetic spectrum electromagnetic waves

A welder wears special glasses to protect his eyes mostly from the harmful effect of 

  1. Very intense visible light

  2. infrared radiation

  3. ultraviolet rays

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

During the welding process, the ultra-violet rays are produced which are not visible but have an intense effect on the eyes. Therefore, the welder makes use of the special glass to protect his eyes.

Option (C) is correct.

Multiple choice biology human brain and sense organs introduction to sense organs eyes and their function the structure and function of the eye

A 22 years student goes to his ophthalmologist. He has problem in reading books, because he is not able to contract his

  1. Suspensory ligament

  2. Pupil

  3. Iris

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

The ciliary muscle is located in the eye and surrounds the lens. It is smooth circular muscle, that relaxes or tightens the zonules to enable the lens to change shape for focusing. When it contracts, it pulls forward, moving to a frontal portion to relax the fibers, that hold the lens in place; this process also allows it to take on a more spherical shape to provide short range focus.

Multiple choice biology human brain and sense organs introduction to sense organs eyes and their function the structure and function of the eye

Meibomian gland are associated with 

  1. Eyes

  2. Ears

  3. Reproductive organ

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

The meibomian glands (or tarsal glands) are a special kind of sebaceous gland at the rim of the eyelids inside the tarsal plate, responsible for the supply of meibum, an oily substance, that prevents evaporation of the eye's tear film. Meibum prevents tear spillage onto the cheek, trapping tears between the oiled edge and the eyeball, and makes the closed lids airtight. There are approximately 50 glands on the upper eyelids and 25 glands on the lower eyelids. Dysfunctional meibomian glands often cause dry eyes.

Multiple choice biology human brain and sense organs introduction to sense organs eyes and their function the structure and function of the eye

If the circular ciliary muscles of the eye are unable to contract, the 

  1. Lens will become more convex

  2. Lens will be thin and stretched

  3. Vision will be lost completely

  4. Bright light will have no adverse effect on retina
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ciliary body and the attached suspensory ligament change the shape (flattened or round) of the lens through relaxation and contraction of ciliary muscles and thereby the focal length to focus on the distant and near object. Contraction of ciliary muscles releases the suspensory ligaments and allow the lens to become round (convex) while relaxation of these muscles makes the lens taut. Since ciliary muscles are involved in accommodation required for close vision, loss of their contraction would not cause loss of vision but would affect the close vision only. The amount of light entering retina is controlled by the iris. 

So, the correct answer is option B.

Multiple choice biology human brain and sense organs introduction to sense organs eyes and their function the structure and function of the eye

Caring, diagnosis and cure of eye diseases

  1. Orthopaedics

  2. Ophthalmology

  3. Pathology

  4. Andrology
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • The word ''Opthalmology'' comes from the Greek roots ''Ophthalmol'' means ''Eye'' and ''Logos'' means ''Study''. Hence Ophthalmology literally means the ''The science of eyes''. 
  • An Ophthalmologist is a specialist in medical and surgical eye problems.
  • Hence Ophthalmology is the study of Caring, diagnosis and cure of eye diseases.
  • So, the correct answer is 'Ophthalmology'.
Multiple choice evs we are special defects of eye disorders of nervous system braille script

Which of the following diseases is concerned with eye?

  1. Sarcoma

  2. Glaucoma

  3. Lymphoma

  4. Myeloma
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sarcoma is the cancer of connective tissues, lymphoma is cancer of lymphatic tissue, myeloma is the cancer of plasma cells. Whereas, glaucoma is a condition that causes damage to the eye's optic nerve and gets worse over time due to viterous humor not being drained and causing pressure on the eye ball.
Thus, the correct answer is option B.

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

Too short eye ball and too flat lens produce

  1. Astigmatism

  2. Presbyopia

  3. Near sightedness

  4. Far sightedness
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
When the eye ball becomes too short or lens get flattened, light rays instead of getting focussed on the retina, get focussed behind the retina. Hence, the image is formed behind the retina. This condition is called hypermetropia, also known as long-sightedness. In this disorder, vision of nearby objects gets blurred. It is corrected using convex rays which help to focus the rays on the retina.
So, the correct answer is 'Far sightedness'. 
Multiple choice evs we are special defects of eye disorders of nervous system braille script

If a patient suffers a stroke that destroys the optic tract on the right side of the brain, which of the following visual defects will result?

  1. There will be no vision in the left eye, but vision will be normal in the right eye.

  2. The patient will not perceive images of objects striking the left half of the retina in the left eye.

  3. The patient will not perceive images of objects striking the right half of the retina in the right eye.

  4. Neither eye will perceive objects in the right side of the patient's field of view.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The right optic tract carries information from the left visual field of both eyes. Damage to the right optic tract results in left homonymous hemianopia, meaning the patient cannot perceive images striking the left half of the retina in the left eye (which corresponds to the right visual field) or the right half of the retina in the right eye (which corresponds to the left visual field). Option B correctly describes the loss of the left half of the retina's input.

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

Find the odd one out of the following 

  1. $Nightblindness$
  2. $Glaucoma$
  3. $Cataract$
  4. $Hyperglycemia$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Night blindness is a vitamin deficiency disorder, whereas glaucoma, cataract, and hyperglycemia (often associated with diabetic retinopathy) are conditions related to eye diseases or systemic metabolic issues affecting the eye.

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

Condition in which one can see nearby objects clearly but can not see distant objects distinctly is called as:

  1. Myopia

  2. Night blindness

  3. Color blindness

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

Myopia is a condition in which the light rays entering the eye converge in front of the retina instead of on the retina, for objects that are at a greater distance.

This results in a blurred image. This is commonly called shortsightedness as they can see objects closer to them clearly but not those that are far away
The defect is corrected using a concave lens
So, the correct answer is 'Myopia'

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

Which of the following disease is related with eye?

  1. Sarcoma

  2. Glaucoma

  3. Lymphoma

  4. Myelenoma
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sarcoma is a type of cancer that develops from certain tissues like bone or muscle.

Glaucoma is a term describing a group of ocular (eye) disorders that result in optic nerve damage, often associated with increased fluid pressure in the eye.
Lymphoma is a cancer of lymphatic cells.
Myeloma is the cancer of plasma cells.
So, the correct answer is 'Glaucoma'.

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

Person who cannot see distant objects is suffering from

  1. Cataract

  2. Hypermetropia

  3. Long sightedness

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

The lens capsule is attached to the ciliary body by a ligament and serves to refract and focus light rays on the retina. Loss of flexibility with age causes presbyopia, characterized by focusing of the image behind the retina. Likewise, too short eyeball causes hyperopia (long-sightedness). In both cases, distant images are clear but the nearby images are blurry and the condition is termed as hypermetropia. 

On the other hand, myopia or nearsightedness is caused by elongation of the eyeball which results in focusing of the image in front of the retina. Thus, the distant images are blurry but the nearby images are clear. 
Cataract is characterized by the presence of opaque lens, incapable of transmitting the light rays and is corrected by surgical replacement of lens with an artificial lens.
So, the correct answer is option D.

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

Too short an eyeball or too flat a lens produces

  1. Nearsightedness

  2. Astigmatism

  3. Myopia

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

The lens capsule is attached to the ciliary body by a ligament and serves to refract and focus light rays on the retina. Loss of flexibility with age causes presbyopia, characterized by focusing of the image behind the retina. Likewise, too short eyeball causes hyperopia. In both cases, distant images are clear but the nearby images are blurry and the condition is termed as hypermetropia.

On the other hand, myopia or nearsightedness is caused by elongation of the eyeball which results in focusing of the image in front of the retina. Thus, the distant images are blurry but the nearby images are clear. 
Astigmatism is the error in vision as caused by refraction defects brought about by abnormal curvature in surface or cornea or lens. This causes fuzzy image formation on the retina due to the uneven focusing of light rays.
So, the correct answer is option D.