Q.1 Which of the following is the most common type of refractive error in children?
Myopia
Hyperopia
Astigmatism
Presbyopia
Explanation - Hyperopia (farsightedness) is more common in children as their eyes are shorter, and myopia usually develops later in adolescence.
Correct answer is: Hyperopia
Q.2 A patient has difficulty seeing distant objects clearly but can see near objects without difficulty. This is most consistent with:
Myopia
Hyperopia
Astigmatism
Presbyopia
Explanation - Myopia, or nearsightedness, occurs when the eye focuses images in front of the retina, causing distant objects to appear blurry.
Correct answer is: Myopia
Q.3 Which type of refractive error is commonly associated with aging due to decreased lens elasticity?
Myopia
Hyperopia
Astigmatism
Presbyopia
Explanation - Presbyopia is an age-related condition where the lens loses flexibility, making near vision difficult.
Correct answer is: Presbyopia
Q.4 Which refractive error is caused by an irregular curvature of the cornea or lens?
Myopia
Hyperopia
Astigmatism
Presbyopia
Explanation - Astigmatism occurs when the cornea or lens is not perfectly spherical, causing blurred or distorted vision.
Correct answer is: Astigmatism
Q.5 Which diagnostic test is commonly used to determine the refractive error of the eye?
Tonometry
Refraction test
Fundoscopy
Slit-lamp examination
Explanation - A refraction test measures how light bends as it enters the eye to determine the degree of refractive error.
Correct answer is: Refraction test
Q.6 Which factor primarily contributes to the development of myopia in adolescents?
Excessive near work
Age-related lens stiffness
Genetic hyperopia
Corneal flattening
Explanation - Prolonged near tasks like reading or screen use can increase the risk of developing myopia in susceptible children and adolescents.
Correct answer is: Excessive near work
Q.7 A patient with hyperopia may experience which of the following symptoms?
Blurred distant vision
Eye strain while reading
Distorted vision at all distances
Loss of color perception
Explanation - Hyperopic eyes focus images behind the retina, requiring extra effort for near vision, often causing eye strain and headaches.
Correct answer is: Eye strain while reading
Q.8 Which refractive error can sometimes be corrected with orthokeratology (overnight contact lenses that reshape the cornea)?
Hyperopia
Myopia
Presbyopia
Astigmatism
Explanation - Orthokeratology temporarily reshapes the cornea to correct myopia, improving distance vision without daytime glasses.
Correct answer is: Myopia
Q.9 Which refractive error is often associated with a steeper-than-normal cornea or longer axial length of the eyeball?
Myopia
Hyperopia
Astigmatism
Presbyopia
Explanation - Myopia typically results from a longer axial length or excessively curved cornea, focusing light in front of the retina.
Correct answer is: Myopia
Q.10 In which type of refractive error does accommodation help to improve vision in younger patients?
Myopia
Hyperopia
Astigmatism
Presbyopia
Explanation - Young hyperopic patients can often use their accommodative ability to see clearly at near, masking their hyperopia temporarily.
Correct answer is: Hyperopia
Q.11 Which refractive error is typically first noticed in middle age due to difficulty reading small print?
Myopia
Hyperopia
Astigmatism
Presbyopia
Explanation - Presbyopia usually appears around age 40 when the lens loses elasticity, making near tasks like reading difficult.
Correct answer is: Presbyopia
Q.12 A patient has blurred vision both near and far and headaches, especially after prolonged reading. This could most likely be:
Astigmatism
Myopia
Hyperopia
Presbyopia
Explanation - Astigmatism causes distortion at all distances due to irregular corneal or lens curvature, often leading to headaches with prolonged focus.
Correct answer is: Astigmatism
Q.13 Which type of lens is used to correct myopia?
Convex lens
Concave lens
Cylindrical lens
Bifocal lens
Explanation - Concave lenses diverge light rays so that images focus correctly on the retina, correcting nearsightedness (myopia).
Correct answer is: Concave lens
Q.14 Which type of lens is used to correct hyperopia?
Convex lens
Concave lens
Cylindrical lens
Plano lens
Explanation - Convex lenses converge light rays to help focus images on the retina, correcting farsightedness (hyperopia).
Correct answer is: Convex lens
Q.15 Which refractive error is commonly associated with corneal or lens asymmetry?
Astigmatism
Myopia
Hyperopia
Presbyopia
Explanation - Astigmatism occurs when the cornea or lens is unevenly curved, causing distorted vision at multiple distances.
Correct answer is: Astigmatism
Q.16 Which refractive error is usually less symptomatic in childhood due to strong accommodative power?
Hyperopia
Myopia
Astigmatism
Presbyopia
Explanation - Children can often accommodate to overcome hyperopia, so it may go unnoticed until later or until visual demand increases.
Correct answer is: Hyperopia
Q.17 Which environmental factor has been linked to an increased prevalence of myopia in children?
High outdoor activity
Prolonged near work
Low screen time
Exposure to bright sunlight
Explanation - Extended periods of reading or screen use can increase the risk of developing myopia in children.
Correct answer is: Prolonged near work
Q.18 Which of the following is a non-surgical method to slow progression of myopia in children?
Atropine eye drops
Convex lenses
LASIK surgery
Cataract extraction
Explanation - Low-dose atropine eye drops can slow myopia progression in children by relaxing ciliary muscle spasm and controlling eye growth.
Correct answer is: Atropine eye drops
Q.19 Which refractive error typically causes difficulty in seeing objects clearly both near and far if severe?
High astigmatism
Low myopia
Mild hyperopia
Early presbyopia
Explanation - High astigmatism leads to irregular focusing of light on the retina, causing blur at all distances.
Correct answer is: High astigmatism
Q.20 Which refractive error can sometimes be compensated with reading glasses in early adulthood?
Presbyopia
Hyperopia
Myopia
Astigmatism
Explanation - Early hyperopia may be managed with reading glasses if the patient struggles with near work, before significant accommodative strain occurs.
Correct answer is: Hyperopia
Q.21 Which factor determines the power of the corrective lens needed for a refractive error?
Degree of blur
Axial length and corneal curvature
Pupil size
Lens thickness
Explanation - The corrective lens power is calculated based on how much the eye's axial length or corneal curvature deviates from normal, affecting focus.
Correct answer is: Axial length and corneal curvature
Q.22 Which refractive error is least likely to be influenced by environmental factors and more by genetics?
Hyperopia
Myopia
Astigmatism
Presbyopia
Explanation - Hyperopia is strongly influenced by the genetic size and shape of the eye, whereas myopia is more affected by environmental factors.
Correct answer is: Hyperopia
Q.23 Which refractive error may improve naturally in children as the eye grows?
Mild hyperopia
Myopia
Astigmatism
Presbyopia
Explanation - As a child's eye elongates during growth, mild hyperopia often decreases and may even resolve naturally.
Correct answer is: Mild hyperopia
Q.24 Which refractive error correction method permanently reshapes the cornea using a laser?
LASIK
Spectacles
Contact lenses
Orthokeratology
Explanation - LASIK uses a laser to permanently reshape the cornea, correcting refractive errors such as myopia, hyperopia, and astigmatism.
Correct answer is: LASIK
Q.25 Which refractive error commonly requires bifocal or progressive lenses in older adults?
Presbyopia
Hyperopia
Myopia
Astigmatism
Explanation - Presbyopia in older adults often necessitates bifocal or progressive lenses to correct both near and distance vision simultaneously.
Correct answer is: Presbyopia