• Does cycloplegia lead to reduced vision during a pseudomyopia test?


    Question:
    When a child has eye drops to test for pseudomyopia, the pupil dilates, so this lead to reduced vision (even if ciliary muscle is relaxed)?

    Answer:

    The mechanism of cycloplegia (relaxing the ciliary muscle, which helps the eye change focus) and dilating the pupil both aid detection of the true refractive error. Pseudomyopia occurs when a patient focuses their lens during the refraction making them appear to have myopia (nearsightedness). With the drops a patient with no refractive error cannot see at near, but can at distance; the nearsighted patient can still see up close but not at distance unless a corrective lens is provided.


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