Yes, too much alcohol lead to color blindness. In addition, alcohol can also directly affect the retina, prevent retina from producing visual pigment, causing decline of eye adaptability to light. Therefore, those who are suffering myopia and glaucoma should refrain from excessive drinking. Moreover, (excessive) alcohol will lead to digestive and absorptive functions decline, which causes a lack of vitamins, inducing eye diseases such as conjunctivitis, optic neuritis, etc. Those patients who are suffering from diabetes or high blood pressure must give up drinking. After excessive drinking, one's blood circulation will speed up and eyes will be bloodshot, causing damage to retina or even go to blindness.
Yes, color blindness can be acquired by heavy alcohol consume. In fact, color blindness is main caused by inherit. That is to say, some people may born with color blindness. But this doesn't mean you won't get color blindness latter. Heavy alcohol consume, poisonous toxins, aging(macular degeneration), diseases like diabetes or sickle cell anemia can also be the causes of color blindness. So, you are suggested to get health life style and not taking too much alcohol if you want to prevent color blindness.
Yes, it is possible that drinking too much alcohol would lead to color blindness. And taking too much alcohol can definitely do some side effects on eyes, such as blindness. A long time of taking too much alcohol will make the nerves of eyes gradually degenerate, then the eyes will see only blurring image. At last, the eyes will have some blind spots, then the eyes will be color blind or totally blind. A short time of drinking too much can lead to migraine, and some people also will feel their eyes blurring and the head ache. Therefore, it is not good to drink too much alcohol.