as for having poor depth perception, my legally-blind left eye forces me to qualify.... landing in the grass at the far edge of the runway happens quite often enough that I've convinced myself I do it to save my prop tips from the asphalt "Fortunately" it's been this way since I'm about 3 years old, so I learned to fly this way and have compensated to a great extent.... my sympathies, it may take a LOOOOOOONG time to adjust....