Hello Umair zaib,
Welcome to EmpowHER and thank you for reaching out to us with your concern.
Night blindness or nyctalopia is the inability to see well at night or in poor light.
It is important to note that it is not a disease in itself, but rather a symptom of an underlying problem, usually a retina problem.
It is common for people who are myopic, which is nearsightedness, to have some difficulties with night vision, but this is not due to retinal disease, but rather to optical issues.
The causes of night blindness fall into two categories, treatable and non treatable.
Treatable causes include nearsightedness, cataracts, use of certain medications, and rarely a Vitamin A deficiency.
Non treatable causes are birth defects and retinitis pigmentosa, which is an eye disease in which there is damage to the retina.
Do you know the cause of your fiancee's night blindness? Is it treatable?
X-linked congenital stationary night blindness is a disorder of the retina, which is the specialized tissue at the back of the eye that detects light and color. People with this condition typically have difficulty seeing in low light (night blindness). They also have other vision problems, including loss of sharpness (reduced acuity), severe nearsightedness , involuntary movements of the eyes and eyes that do not look in the same direction .
The sex chromosome appears in a pair of XX in females and as XY in males.
I can only suggest you both speak with her ophthalmologist or primary care physician to find out what the cause is and if there is any risk of X-linked congenital stationary night blindness.