We purposed to evaluate the results of TNO and Titmus stereoacuity tests in ophthalmo- logically healthy children. Methods: Sixty-two chil- dren between 4 and 14 years of age, with no ocular pathology were prospectively assessed using Titmus and TNO stereoacuity tests. Results: Fourteen of 62 patients (% 22) were found to be stereo negative with TNO test. Of those 14 chil- dren, the mean stereoacuity score was 110.71 secs of arc (between 40 and 400 secs of arc) with Titmus test. Forty-eight children answering the TNO test have an average stereoacuity level of 153.75 secs of arc with TNO and a stereoacuity of 46.67 secs of arc with Titmus test. All children responded to the Titmus test and their average stereoacuity score was 61.13 secs of arc. Conclusions: Titmus test was easier to apply to children and seems more efficient to show the existence of stereopsis in healthy chil- dren than the TNO test. Any clinician, delivering stereoacuity tests should establish the standard conditions for his/her examination and should seek for a more efficient and practical stereoacuity test or still better, tests.
Amblyopia, stereoacuity, titmus, TNO, visual screening