ACCURACY OF AN OBJECTIVE AUTOREFRACTOMETER IN CORRECTION OF REFRACTIVE ERRORS AND ITS RELATION TO PATIENT'S AGE
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Accuracy of the objective autorefractometer (AR.) Nidek-1100 in determination of correction for refractive errors was studied in 1200 eyes of 600 patients. A.R. spherical power readings were correct in 32.55% of eyes, over correct from 0.25 to o.50 D. in 55.01% and > 0.75 D. in 9.85%, while it was undercorrect from 0.25 to 0.50 D. in 2.59%. Cylinderical power readings were correct in 29.12%, over correct from 0.25 to 0.50 D. in 63.31% and > 0.75 D in 6.9%, while it was under correct in 0.67%. Accuracy of spherical power determination in young age was less than old age, while patients age hod no effect on cylinderical power. A.R.was accurate in cylinderical axis determination in 94.35% of eyes. Objective autorefractometer could be considered a preliminary rapid guide in determination of correction for refractive errors, however, its readings should not be prescribed without checking its subjective acceptance by the patient.