Green blindness is also called second color blindness. The brightest part of the spectrum seen by the patient is in the orange part, and the center point is about 500 nanometers. All spectra are light yellow, gray and blue. Patients will regard green as gray or dark black, and can't tell light green from dark red, purple from cyan, and purple from gray.
Clinically, red blindness and green blindness are collectively referred to as red-green blindness, and patients are more common. We usually refer to color blindness as red and green color blindness. Red-green color blindness is determined by two pairs of recessive genes on X chromosome, namely red-blind gene and green-blind gene. Because these two pairs of genes are closely connected on the X chromosome, they are often represented by a gene symbol.
The causes of color blindness are as follows: Color blindness can be divided into congenital color blindness and acquired color blindness.
Congenital color blindness: red-green color blindness is a sex-linked recessive genetic disease, and cone cell dystrophy is autosomal recessive inheritance. Clinically, most people belong to congenital color blindness.
Acquired color blindness: it can be caused by diseases of macula, retina, optic nerve and occipital cortex, or by drug poisoning.
Congenital color blindness is difficult to treat because of the influence of genetic genes; Acquired color blindness is mainly affected by other factors. By solving these external factors, acquired color blindness may be improved.
Refer to the above content: Baidu Encyclopedia-Red and Green Color Blindness