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Robert Orsillo, Peter Derr; Quantifying the Impact of Vision Training using Short Duration Transient Visual Evoked Potential (SD-tVEP). Invest. Ophthalmol. Vis. Sci. 2013;54(15):5308.
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© ARVO (1962-2015); The Authors (2016-present)
To objectively quantify changes in the SD-tVEP’s latency resulting from the completion of a vision training program.
Forty-seven subjects with a mean age of 21.18±3.38 (SD) were tested. All subjects had a BCVA of 20/30 or better. Vision training drills were designed with the goal of improving the span and speed of visual recognition. The subject’s score is determined by the number of the subject’s correct responses to a set of rotating peripheral presentations. There is a time limit for the subject to respond to each presentation and has a finite number of trys of each presentation. Baseline SD-tVEPs measurements were recorded prior to initiating the visual training protocol. The drill protocols were conducted for eight weeks, three times per week for a period of 15 minutes each session. After eight weeks SD-tVEPs were recorded using the Diopsys NOVA System (Diopsys, Inc. Pine Brook, NJ). Each eye was stimulated with low and high Michelson contrast checkerboard patterns. High contrast checks were presented at 6, 12 and 24 minutes of arc while low contrast checks were presented at 24 minutes of arc. Test duration was 15 seconds/eye. Each subject’s SD-tVEP latency response was compared to the baseline recording.
83% of the subjects completed the program. 48% of the subjects showed a unilateral reduction in the P100 latency at the low contrast SD-tVEP while 52% had a bilateral P100 latency reduction. At high contrast, 22% had a unilateral P100 latency reduction while 66% had a bilateral P100 latency reduction. 12% of the subjects showed no latency reduction at high contrast.
SD-tVEP objectively measured the reduction in the P100 latency as a result of the vision training program. The low contrast SD-tVEP P100 latency demonstrated the largest sensitivity to the training.
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