Biology ยท 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

Which retinal disorder is characterized by the combination of hearing loss and vision problems?

  1. Usher syndrome

  2. Retinitis pigmentosa

  3. Stargardt disease

  4. Leber congenital amaurosis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Usher syndrome is a group of genetic disorders that affect both hearing and vision. It can cause progressive hearing loss, retinitis pigmentosa, and balance problems.

Multiple choice

Which retinal disorder is characterized by the accumulation of drusen, small yellow deposits, in the macula?

  1. Age-related macular degeneration

  2. Diabetic retinopathy

  3. Retinal detachment

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

Age-related macular degeneration is characterized by the accumulation of drusen in the macula, the central part of the retina responsible for sharp central vision.

Multiple choice

What is the difference between single-vision and multi-focal lenses in eyeglasses?

  1. Single-vision lenses correct one type of vision problem.

  2. Multi-focal lenses correct two or more types of vision problems.

  3. Single-vision lenses are always thinner than multi-focal lenses.

  4. Single-vision lenses are always less expensive than multi-focal lenses.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Single-vision lenses are designed to correct one type of vision problem, such as nearsightedness or farsightedness, while multi-focal lenses are designed to correct two or more types of vision problems, such as nearsightedness and presbyopia.

Multiple choice

What is the leading cause of blindness in men in the United States?

  1. Age-related macular degeneration

  2. Cataracts

  3. Glaucoma

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

Age-related macular degeneration is the leading cause of blindness in men in the United States.

Multiple choice

Which of the following is NOT a type of visual impairment considered in Paralympic classification?

  1. Blindness

  2. Low vision

  3. Color blindness

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

Color blindness is not a type of visual impairment considered in Paralympic classification. Blindness, low vision, and nystagmus are the three main types of visual impairments.

Multiple choice

What is the most common type of corneal dystrophy?

  1. Fuchs' dystrophy

  2. Keratoconus

  3. Pellucid marginal degeneration

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

Fuchs' dystrophy is the most common type of corneal dystrophy, affecting approximately 1 in 200 people. It is characterized by the accumulation of abnormal deposits in the cornea, which can lead to vision problems.

Multiple choice

What is the leading cause of corneal blindness worldwide?

  1. Trachoma

  2. Onchocerciasis

  3. Vitamin A deficiency

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

Trachoma is the leading cause of corneal blindness worldwide, affecting an estimated 1.9 million people. It is a chronic infectious disease caused by the bacterium Chlamydia trachomatis, which is spread through contact with infected eyes or contaminated objects.

Multiple choice

What is the term for a condition in which the cornea becomes progressively thinner and weaker?

  1. Keratoconus

  2. Pellucid marginal degeneration

  3. Terrien marginal degeneration

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

Keratoconus is a condition in which the cornea becomes progressively thinner and weaker, causing it to bulge outward. This can lead to significant vision problems, including blurred vision, double vision, and astigmatism.

Multiple choice

What is the surgical procedure used to correct keratoconus?

  1. Corneal collagen cross-linking

  2. Corneal transplant

  3. Intacs

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

Corneal collagen cross-linking is a surgical procedure used to strengthen the cornea and prevent further progression of keratoconus. It involves the use of ultraviolet light and a photosensitizing agent to create new cross-links between the collagen fibers in the cornea.

Multiple choice

What is the most common type of corneal ulcer?

  1. Bacterial corneal ulcer

  2. Fungal corneal ulcer

  3. Viral corneal ulcer

  4. Acanthamoeba corneal ulcer
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bacterial corneal ulcers are the most common type of corneal ulcer, accounting for approximately 70% of all cases. They are typically caused by bacteria such as Staphylococcus aureus, Pseudomonas aeruginosa, and Streptococcus pneumoniae.

Multiple choice

What is the term for a condition in which the cornea becomes cloudy or opaque?

  1. Corneal opacity

  2. Corneal edema

  3. Corneal scarring

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

Corneal opacity is a condition in which the cornea becomes cloudy or opaque, which can lead to vision problems. It can be caused by a variety of factors, including infection, injury, and genetic disorders.

Multiple choice

What is the surgical procedure used to remove a corneal opacity?

  1. Corneal transplant

  2. Corneal debridement

  3. Corneal laser surgery

  4. Corneal cross-linking
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Corneal transplant is the surgical procedure used to remove a corneal opacity and restore vision. It involves replacing the damaged cornea with a healthy donor cornea.

Multiple choice

What is the term for a condition in which the cornea becomes inflamed?

  1. Keratitis

  2. Conjunctivitis

  3. Uveitis

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

Keratitis is a condition in which the cornea becomes inflamed. It can be caused by a variety of factors, including infection, injury, and autoimmune disorders.

Multiple choice

What is the treatment for keratitis?

  1. Antibiotics

  2. Antifungal medications

  3. Antiviral medications

  4. Steroid eye drops
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

The treatment for keratitis depends on the underlying cause. Bacterial keratitis is treated with antibiotics, fungal keratitis is treated with antifungal medications, and viral keratitis is treated with antiviral medications. Steroid eye drops may also be used to reduce inflammation.

Multiple choice

What is the term for a condition in which the cornea is abnormally curved?

  1. Astigmatism

  2. Myopia

  3. Hyperopia

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

Astigmatism is a condition in which the cornea is abnormally curved, causing light to be focused unevenly on the retina. This can lead to blurred vision, double vision, and eye strain.