Which of the following items about prism are true?( )
A. Prisms are used to quantify the amount of deviation.
B. The prism diopteris defined as the strength of prism necessary to deflect a light beam 1 cm at 1m distance
C. The prism is hold in front of the eye with base in for an esotropic patient
D. The sum prism strength is much greater than the sum of the individual prism strengths
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Which of the following items about Hirschberg method are true?( )
A. Corneal light reflex tests take into account the angle ĸ
B. A light reflection at the pupillary border signifies a 15° or 30Δ deviation
C. A light reflection at the mid-iris signifies a deviation of a 30° or 60Δdeviation
D. A light reflection at the limbus signifies a deviation of a 45° or 90Δdeviation
According to direction of deviation, strabismus can be classified into( )
A. Esotropia & exotropia
B. Hypertropia & hypotropia
C. Incyclotropia & excyclotropia
D. Protopsis & enophthalmos
Monovision LASIK helps to the treatment of presbyopia by( ).
A. Preventing presbyopia
B. Correcting the distance vision of the dominant eye
C. Making the nondominant eye slightly nearsighted
D. Making both eyes slightly nearsighted
Which of the following items are not true?( )
A. Presbyopia typically occurs with unilateral blurred vision at near
B. A myopic guy will not develop presbyopia
C. Relief of the previous symptoms of presbyopia can be seen in an aging person who is developing nuclear cataract.
D. The amplitude of accommodation decreases throughout life until 40 years old
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