| Author | 5 Posts |
sing
Forum Guru
Topics: 153
Posts: 370
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which of the following applied tropically produces mydriasis without producing cycloplegia?
a. phenylephrine
b. atropine
c. phentolamine
d. pilocarpine
A&Y
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| Malaysian
Forum Guru
Topics: 28
Posts: 778
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B.
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| sing
Forum Guru
Topics: 153
Posts: 370
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a is the right answer. but i don't know why.
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| Dr. Hussam
Forum Junior
Topics: 5
Posts: 56
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ya its a, cuz phenylephrine is a sympathomimetic which only affects alpha 1 receptors of iris sphincter muscle, without interfering with the ciliary body function, while atropine blocks parasympathetic receptors both in iris and ciliary body causing cycloplegia.
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| sing
Forum Guru
Topics: 153
Posts: 370
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thanks.
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