Observational Study to Assess the Reliability and Validity of the MLYMT and MLSDT

"The goal of this observational study is to assess the reliability and validity of the multi-luminance Y-Mobility Test (MLYMT) and multi-luminance shape description test (MLSDT) for evaluation of subjects with severe vision impairment due to RP.~Normally sighted subjects will provide a control group. The MLYMT consists of two LED panels, one of which is illuminated at multiple luminance levels, positioned at the end of Y-configuration. Seven obstacles are placed ahead of the panels, which the test subject should detect and avoid before reaching and touching the lit panel."