Quantifying Improved Visual Performance Through Vision Training

摘要

This project developed a criterion-free vision training test to improve contrastsensitivity in normal and abnormal vision. The scientific development, evaluation and refinement of noninvasive techniques for improving contrast sensitivity is important since contrast sensitivity is predictive of much everyday visual performance. Two novel techniques of contrast sensitivity training were tested. Static contrast sensitivity at low and high spatial frequencies was first measured and then trained on a CRT display. Additional measures were obtained before and after training on a contrast sensitivity chart and on detection and discrimination of complex targets. Large increases in contrast sensitivity due to vision training were found in some normal and amblyopic observers. There were large individual differences in the amount of improvement on contrast sensitivity and performance tasks. Increased contrast sensitivity ranged from 11.5% to 69.2% in normals and from 1.5% to 69.5% in amblyopes. Improvement in detection and discrimination of real-world targets ranged from 0% to 81.2% in normals and from 0% to 96.2% in amblyopes. These results suggest that two-alternative forced-choice methods are effective training procedures in many normal and amblyopic observers.