Vision insurance is a type of insurance that provides coverage for eye exams, eyeglasses, and contact lenses. There are several reasons why someone may choose to buy vision insurance:

1. Cost savings: Vision insurance can help you save money on routine eye care expenses, such as eye exams, eyeglasses, and contact lenses.

2. Improved access to eye care: Vision insurance can make it easier for you to access routine eye care services by covering the cost of eye exams and providing discounts on eyewear.

3. Protection against unexpected expenses: Vision insurance can help protect you against unexpected eye care expenses, such as the need for new eyeglasses or contact lenses due to a change in your vision.

4. Better eye health: Regular eye exams can help detect eye problems early, which can improve the chances of successful treatment and better eye health.

5. Convenience: Many vision insurance plans offer access to a network of eye care providers, making it easier to find a provider who accepts your insurance and schedule appointments.

It's important to note that vision insurance typically does not cover major medical issues related to the eyes, such as cataracts, glaucoma, or other eye diseases. Additionally, not everyone may benefit from vision insurance, particularly if you do not wear glasses or contact lenses or if you have low out-of-pocket costs for routine eye care services.