Optometry Exam Questions with Correct Answers

Optometry Exam Questions with Correct Answers You must observe patient during visual field testing - Answer-you must watch for their fixation, their attention, their lapses in concentration, any ptosis (droopy eyelids), discomfort, etc. You must keep the patient motivated during the visual field test - Answer-make sure you encourage them since it is such a long test. They will be more mad to repeat it over again. Do you dilate during visual field testing? - Answer-It depends on the patients pupil size. If pupils are smaller than 3mm, you should dilate because they create diffuse (defects not actually there) depression in visual field. Generally older people have smaller pupils. Also if someone was dilated before for this test, do it again. Where to place Spherical and Cylindrical Lens - Answer-Spherical-closest to patient Cylindrical-closest to machine Choosing the Correct trial lens - Answer-assess the age of the patient first- if the patient is a presbyope combine the distance rx with an add based on the patients age to determine the final trial lens. HVF can calculate the trial lens with distance RX and date of birth. It ends up being +0.25-+.075 more than the patients add. then assess if the patient is dilated. If they are, no matter what age you must add +3.00 to the distance rx to determine the final trial lens Why do you add +3.00 if the patient is dilated? - Answer-this accounts for the distance of the bowl's radius of 33cm, which is a smaller working distance than normal. Normal is about 40cm and our natural max add is +2.50. Since the bowl is shorter, we need a little more power to converge it.