Yes, UnitedHealthcare offers insurance plans that include dental cleanings and routine eye check-ups. Eye check-up policies may include routine check-ups and prescription lenses. Dental coverage includes dental cleanings and exams. To know better, it's better to have a word with the UnitedHealthcare officials to know better about their plans about dental and vision coverage.

Cigna and Humana both provide good health insurance for senior citizens. But i would suggest Humana because the Humana plan is available in almost 90% of the US. However, Cigna is only available in 18% of the US. In terms of ratings and quality, Humana gives you better results. Cigna focuses more on wide coverage with wellness services.
Therefore, carefully select a health insurance plan that meets your needs, including your healthcare needs, budget, and quality services.