Glasses with bifocal or prism lenses may help When you've got a tough time on the lookout down. they will let you see things which are reduce without needing to shift your eyes.
Fig 1 (CONSORT circulation diagram) https://carlyhgbm749106.theisblog.com/30379251/how-much-you-need-to-expect-you-ll-pay-for-a-good-rehabilitation-in-progressive-supranuclear-palsy