Doctor insights on:
Pinhole Test Eye
Not definitively: Pinhole helps to test for any refractive error, and can help predict best potential acuity (pap). Lazy eye amblyopia is defined: DX of exclusion, once the visual pathway is determined to be ok but the vision is still limited due to developmental changes in the brain visual cortex. ...Read moreSee 1 more doctor answer
I have seen a lot of mixed opinions on if pinhole glasses will help one's eyes, but will wearing them do any harm?
Blurry vision: Pinhole glasses, like squinting, help to refine your focus generally with distance viewing. The pinholes limit the amount of light entering your eyes and therefore are not practical way of helping your vision. The ophthalmologist uses pinhole acuity to help determine whether a refractive error exists. The pinhole glasses are harmless. Better approach is just getting a refraction for glasses. ...Read moreSee 1 more doctor answer
Which eye dominant?: This is very important in refractive surgery. Line up one's thumb with both eyes open focusing on a distant target. Close the right eye and see if it is still aligned with the thumb. If it is you are right eye dominant if not you will notice it aligned when you close the left eye and you are right eye dominant. ...Read more
No pain: There is a slight stinging from the numbing drop applied before the test. The test touches the center of the cornea with an ultrasonic, tiny probe which you will not feel. One touch is all and the data is recorded. Not a test to be worried about in the least. ...Read more
Specific parts of Rx: To expand on dr. Proffitt's answer, sph = sphere; if this is a negative number, the prescription is a myopic or nearsighted prescription and a positive number dictates a farsighted or hyperopic prescription. Cyl = cylinder or the amount or power of the astigmatism correction. Axis is the direction in which the astigmatism correction is placed in the glasses. ...Read moreSee 1 more doctor answer
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