What dietary components are essential for maintaining ocular health?

Vitamins A, C, E, and omega-3 fatty acids play crucial roles in supporting ocular health. Vitamin A is vital for maintaining good vision and is essential for the functioning of the retina; it helps in the production of rhodopsin, a pigment necessary for night vision. Vitamin C is a powerful antioxidant that helps protect the eyes from oxidative damage, potentially lowering the risk of cataracts and age-related macular degeneration. Vitamin E also functions as an antioxidant, helping to stabilize cell membranes and protect eye tissues from free radical damage.

Omega-3 fatty acids are important for maintaining the structural integrity of the retina and may help prevent dry eye syndrome by supporting the production of healthy tear film. Together, these nutrients work synergistically to promote overall eye health and reduce the risk of various ocular diseases.

In contrast, options that suggest either only carbohydrates or excessive sugar and salt do not support eye health—in fact, high sugar and salt intake can lead to other health issues that may indirectly affect ocular wellness. 'None of the above' fails to recognize the significance of the listed dietary components in maintaining eye health. Thus, the correct answer highlights the importance of these essential nutrients for preserving vision and preventing eye-related conditions.