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
Which lens aberration is responsible for the appearance of a hazy or milky glow around bright objects in an image?
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Spherical aberration
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Coma
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Astigmatism
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Flare
D
Correct answer
Explanation
Flare is a lens aberration that occurs when stray light enters the lens and is scattered within the lens elements. This results in the appearance of a hazy or milky glow around bright objects in the image, often accompanied by a loss of contrast and image quality.
Which of the following is NOT a type of lens flare?
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Veiling Flare
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Ghost Flare
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Starburst Flare
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Chromatic Flare
D
Correct answer
Explanation
Chromatic flare is not a type of lens flare. It is a type of optical aberration that causes colors to be dispersed, resulting in a rainbow-like effect in the image.
What is the term used to describe the effect of a lens flare appearing as a series of bright streaks?
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Bokeh
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Lens Flare
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Chromatic Aberration
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Vignetting
B
Correct answer
Explanation
The effect of a lens flare appearing as a series of bright streaks is called a streak flare. It is caused by the reflection of light from the edges of the lens aperture.
What is the primary cause of uveitis?
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Bacterial infection
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Viral infection
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Autoimmune disorder
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Trauma
C
Correct answer
Explanation
Uveitis is often caused by an autoimmune disorder, where the body's immune system mistakenly attacks the eye tissues.
Which of the following is a symptom of retinal detachment?
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Floaters and flashes of light
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Blurred vision
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Loss of peripheral vision
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Eye pain
A
Correct answer
Explanation
Retinal detachment is characterized by the separation of the retina from the underlying choroid, causing floaters and flashes of light, blurred vision, loss of peripheral vision, and sometimes eye pain.
What is the immediate treatment for a corneal abrasion?
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Antibiotic eye drops
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Pain relievers
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Eye patch
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Corneal transplant
C
Correct answer
Explanation
The immediate treatment for a corneal abrasion is to apply an eye patch to protect the cornea and promote healing.
Which of the following is a risk factor for developing a stye?
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Blepharitis
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Conjunctivitis
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Dry eye syndrome
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Vitamin A deficiency
A
Correct answer
Explanation
Blepharitis, an inflammation of the eyelid margins, is a common risk factor for developing a stye.
What is the most common cause of sudden vision loss in a patient with diabetes?
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Cataract
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Glaucoma
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Diabetic retinopathy
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Macular degeneration
C
Correct answer
Explanation
Diabetic retinopathy, a complication of diabetes, is the most common cause of sudden vision loss in diabetic patients.
Which of the following is a symptom of optic neuritis?
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Painful eye movements
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Blurred vision
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Loss of color vision
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Double vision
A
Correct answer
Explanation
Optic neuritis, an inflammation of the optic nerve, is characterized by painful eye movements, blurred vision, loss of color vision, and sometimes double vision.
What is the treatment for a corneal ulcer?
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Antibiotic eye drops or ointment
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Corneal transplant
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Laser therapy
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Eye patch
A
Correct answer
Explanation
The treatment for a corneal ulcer typically involves antibiotic eye drops or ointment to combat the infection.
What is the primary treatment for a detached retina?
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Laser therapy
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Cryotherapy
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Vitrectomy
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Eye patch
C
Correct answer
Explanation
The primary treatment for a detached retina is vitrectomy, a surgical procedure to remove the vitreous humor (the gel-like substance filling the eye) and reattach the retina.
Which of the following is a risk factor for developing a pinguecula?
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Age
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Sun exposure
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Dry eye syndrome
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Vitamin A deficiency
B
Correct answer
Explanation
Sun exposure is a major risk factor for developing a pinguecula, a yellowish bump on the conjunctiva (the clear outer layer of the eye).
What is the term for a group of eye diseases that damage the retina, the light-sensitive tissue at the back of the eye?
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Age-related macular degeneration (AMD)
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Cataracts
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Glaucoma
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Diabetic retinopathy
A
Correct answer
Explanation
Age-related macular degeneration (AMD) is a group of eye diseases that damage the macula, the central part of the retina responsible for sharp central vision.
Why is it important to protect your eyes when viewing a partial eclipse?
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The Sun's rays can damage your eyes.
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The Moon's rays can damage your eyes.
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The Earth's rays can damage your eyes.
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None of the above.
A
Correct answer
Explanation
It is important to protect your eyes when viewing a partial eclipse because the Sun's rays can damage your eyes. The Sun's rays are very intense, and even a small amount of exposure can cause damage to your eyes.
What are some common vision problems that may be identified through school vision screenings?
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Nearsightedness
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Farsightedness
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Astigmatism
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Amblyopia
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Strabismus
Correct answer
Explanation
Common vision problems that may be identified through school vision screenings include nearsightedness, farsightedness, astigmatism, amblyopia, and strabismus.