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?
Compared to standard: The chart used to test the eye is calibrated for normal vision at 20 feet. The outcome achieved is compared to what a normal eye can see at 20 feet. So if you can only see at 20 feet what a normal eye sees at 40 feet, your vision is considered to be 20/40. This is measured with and without corrective lenses at distance and at near. The vision with correction is considered to show the true vision. ...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
Complicated: No single test is 100 percent for diagnosing glaucoma. As such, some tests may be normal (ie normal field of vision) while other tests (such as tests of eye structure) can show damage. Glaucoma involves damage to the eye - so if all the tests are normal and the optic nerve looks healthy then by definition that person doesnt have glaucoma (though they may be at high risk for getting it later on). ...Read moreSee 4 more doctor answers
Routine screening...: for glaucoma should be performed with any type of Eye exam. Typically this will include a vision and an eye pressure. However it is all known that one must look directly at the optic nerve to best assess whether not glaucoma is present. This is not always performed at every eye exam. If there is concern or an increased risk for glaucoma, that should be communicated well at time of visit. ...Read moreSee 1 more doctor answer
Multifocal : Current and latest refraction is always the best. ...Read more
Yes: Should not be a problem unless you have an eyelid issue you want assessed @ that visit. ...Read more
No: These numbers do not translate directly into a snellen acuity number (like 20/20). The degree of visual clarity is different than the eyeglass strength to achieve that clarity. ...Read more
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