SUMMARY
The authors have examined the stereoscopic Vision of 27 patients with low vision. Their age varied from 4 to 55 years (average 16 years, standard deviation 13.75 years) and the visual acuity from 0.06 to 0.3. LH and ETDRS charts were used to check visual acuity at 6 m and 33 cm. Ametropic errors were corrected. Next stereopsis was checked by Titmus and Lang tests. Analysis of the results showed that it was possible to check stereopsis with those tests in patients with vision up to 0.05. With the Titmus test, 11 patients (40.74%>) showed a positive response and 16 patients (59.25%) a negative one. With the Lang test, 7 patients (25.92%) had a positive and 20 ( 74.07%) a negative response. The authors discuss the use of stereoscopic tests in patients with low vision.
Key words:
Low vision; Stereopsis; Lang Titmus Tests