Individuals with mild optical defects can see clearly without corrective lenses in bright light but not in dim light.

“we for the optical defects in our eyes most or many of which can be corrected with just having the right prescription lenses we can get away with it without using those Corrections in brighter light and so during the daytime um you know uh you could be slightly blurry you know if I have a real bright light uh and a good high contrast book you know with black letters on the white page I can get away with reading that without my readers unlike if if I'm in dim light then I feel and that might be kind of what you're describing if you're reading at night you actually prefer to use the readers a little more even at night because we can make up for a lot of that blur if we just have bright enough signal and contrast coming into our eyes”