Answer:

Color blindness is a condition where the eyes struggle to distinguish or recognize certain colors, such as red, green, blue, and yellow. In rare cases, individuals may perceive the world only in shades of black, white, and gray.

Several eye conditions can impair color perception, including glaucoma, macular degeneration, cataracts, retinal detachment, and retinitis pigmentosa.

Congenital inheritance is a primary cause of color blindness, often linked to two distinct gene groups located on separate chromosomes. Typically, the condition is an X-linked recessive genetic disorder. This means males need only one X chromosome carrying the affected gene to show symptoms, while females must have both recessive genes on their XX chromosome pair to develop the condition. This explains why males have a higher incidence of color blindness than females. Additionally, medicine classifies the condition based on the type of gene affected: mutations on the X chromosome lead to red-green color blindness, while rarer gene mutations on chromosome 7 cause yellow color blindness.

A comprehensive eye exam is necessary to thoroughly check the fundus (back of the eye) to rule out other conditions that could impair color perception. If screening results are normal, color blindness likely has a genetic origin. In such cases, doctors order gene testing to identify the specific mutation and advise on the risk of inheritance for the fetus.

If you have a son, he will inherit color blindness because he receives the X chromosome from the mother. If you have a daughter, she will receive one normal X chromosome from the father and one X chromosome carrying the affected gene from the mother, meaning she will be a healthy carrier.

Doctor Thao provides genetic counseling to a couple. Illustration: Tam Anh District 7 General Clinic.

Color blindness caused by gene mutations does not severely impact quality of life. Children with the condition can still live, study, and develop normally. However, it may pose certain limitations when they reach adulthood and choose specialized professions requiring high color accuracy.

Today, with advancements in science and technology, individuals with color blindness can use specialized color-filtering glasses or artificial intelligence (AI) integrated applications to significantly improve their ability to distinguish colors in daily life.

If you are pregnant and have color blindness, or if a family member has the condition, expectant mothers should seek early eye examinations and genetic counseling to assess the risk to the fetus. The results from specialized eye exams, gene testing, and prenatal care help doctors accurately determine the cause and develop a suitable monitoring plan throughout pregnancy.

MSc. Doctor Nguyen Phuong Thao

Fetal Medicine Unit

Tam Anh District 7 General Clinic