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Thread: drugs acting on the eye

  1. #1
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    Thumbs down drugs acting on the eye

    (pharmacology)
    1. Direct-acting cholinergic
    agonists include:
    a. pilocarpine
    b. echothiophate
    iodide
    c. carbachol
    d. tropicamide
    e. atropine
    2. The ocular effects of
    prostaglandins include:
    a. breakdown of
    blood-aqueous barrier
    b. miosis
    c. conjunctival
    hyperaemia
    d. eyelid retraction
    e. ocular hypertension
    3. True statements about
    carbonic anhydrase
    inhibitors include:
    a. at least 50% of the
    carbonic anhydrase
    needs to be inhibited
    before the
    intraocular pressure
    shows a significant
    drop
    b. they inhibits
    carbonic anhydrase
    found in the non-
    pigmentary ciliary
    epithelium.
    c. shallowing of the
    anterior chamber is a
    feature
    d. transient
    hypermetropia is a
    feature
    e. it can cause
    thinning of the cornea
    if given topically
    4. The effect of pilocarpine
    include:
    a. increased incidence
    of retinal tear
    b. increased tension in
    the zonules
    c. contraction of the
    ciliary body
    d. increased thickness
    of the lens
    e. increased
    permeability of the iris
    vessels
    5. Phenylephrine:
    a. directly stimulates
    the alpha-adrenergic
    receptors
    b. affects the
    accommodation
    c. stops the pupil
    response to bright
    light
    d. causes mydriasis
    which does not
    respond to pilocarpine
    e. causes rebound
    miosis
    6.The following are true about
    physostigmine:
    a. it is a reversible
    cholinesterase
    b. it does not penetrate the
    blood-brain barrier
    c. it acts on the muscarinic
    receptors
    d. it acts on the nicotinic
    receptors
    e. it causes miosis
    7.Physostigmine:
    a. causes accommodative
    spasm
    b. causes conjunctival
    vasoconstriction
    c. increases the intraocular
    pressure
    d. causes twitching of the
    eyelids
    e. can be used in infestation
    caused by pubic lice
    8 Pilocarpine:
    a. is an alkaloid derived
    from plant
    b. is a direct acting
    muscarinic agonist
    c. causes contraction of the
    longitudinal muscles of the
    ciliary
    body
    d. worsens myopia
    e. has a greater effect on
    patients with blue iris than
    brown iris.
    9 Cocaine:
    a. decreases conduction of
    nerve impulses
    b. has an anaesthetic effect
    on the cornea
    c. is a direct stimulator of
    the adrenergic receptors
    d. causes tachycardia
    e. causes increased blood
    pressure
    .10. Mydriasis occurs with:
    a. thymoxamine
    b. guanethidine
    c. carbachol
    d. neostigmine
    e. ecothiophate

  2. #2
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    Last edited by ansh1011; 09-24-2009 at 09:17 AM.

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