In relation to ocular health, diabetes mellitus is primarily known for increasing the risk of which condition?

Diabetes mellitus is linked to a range of ocular health issues, and recognizing the comprehensive impact of this condition is crucial. The correct answer indicates that diabetes can increase the risk of all the specified conditions: glaucoma, retinal vein occlusion, and cataracts.

Diabetes can lead to glaucoma by increasing the risk of intraocular pressure due to changes in the drainage of aqueous humor, particularly in those with diabetic retinopathy. It also is associated with retinal vein occlusion, where high blood sugar levels can contribute to changes in blood vessels, leading to blockages. Additionally, individuals with diabetes are more prone to the development of cataracts because elevated glucose levels can lead to changes in the lens of the eye, causing clouding.

Each of these conditions poses significant risks to vision, and understanding their association with diabetes underscores the importance of regular eye examinations for individuals with this condition. Thus, the comprehensive impact of diabetes on ocular health justifies that it increases the risk for all these conditions.