Medical reports from past space missions have documented pilots’ vision assessments, primarily focusing on near and far visual acuity and  retinal function via Amsler grid testing. However, a comprehensive evaluation  of visual functions requires additional tests to fully understand the impact of microgravity. Together, these tests can give us a complete picture of  gravity’s effects on human vision. Rakia mission astronauts underwent tests  to assess their color vision, 3D vision, contrast sensitivity, and visual field, as well as Amsler grid testing, and near and far visual acuity assessments.    

This is one of the clinical studies  conducted on the Ax-1 crew.