Antony
Graduate Poster
I believe you are schooling a medical doctor.
Heroin. Individuals suffering from heroin addiction and drug abuse may have tightly constricted pupils. Their pupils will not respond to low light, impairing vision. In addition the constriction of the blood vessels, can lead to loss of vision or blurred vision. -
Yes, exactly - but it's not because of blurring, but dimming of the image. This was the point I was making in my original response.
In any case, it's certainly not the case that far vision is affected differently than close-up, in relation to pupil size.