Some studies have suggested that certain nutritional supplements, such as antioxidant vitamins and minerals, may have a protective effect on the eyes and potentially delay the progression of cataracts. However, the evidence is not conclusive, and the use of nutritional supplements for cataracts should be discussed with a healthcare professional. The dosage and quality of supplements can vary, and not all supplements may be suitable for everyone. A well-balanced diet that includes a variety of nutrient-rich foods is generally recommended for overall eye health.