Question to the Department of Health and Social Care:

To ask the Secretary of State for Health and Social Care, what steps he is taking to improve the rates of colour vision deficiency among men.

In the majority of cases, colour vision deficiency is caused by a hereditary genetic fault. Due to the pattern of inheritance, the condition most commonly appears in males, with females being carriers rather than expressing the condition, resulting in much higher rates among men. Colour vision deficiency acquired later in life may improve with treatment for the underlying cause. Sight tests are recommended every two years, although some people will be advised to attend more frequently due to increased risk factors.

However, occasionally colour vision deficiency may develop later in life as a result of other factors such as a side effect of certain medications and underlying health conditions, such as glaucoma and diabetes. Diabetic retinopathy can lead to problems with vision, including colour vision deficiency. The National Health Service diabetes prevention programme identifies those at high risk of developing diabetes and refers them for tailored, personalised education. Diabetic retinopathy screening is also offered to anyone over the age of 12 years old who has diabetes.