The question of how long eye prescriptions last is common among people who wear eyeglasses or contact lenses. Generally, eye prescriptions are considered valid for 1-2 years, depending on several factors such as age, medical history, and eye health.

According to the American Optometric Association, adults aged 18 to 60 should have their eyes examined at least once every two years if they are not experiencing any vision problems. However, those with a history of vision problems, diabetes, or other medical conditions may need to have their eyes checked more frequently.

For children, it is recommended to have their first eye exam by six months of age, their second exam at age three, and subsequent exams every two years or as recommended by their eye care professional.

It is important to note that if you experience changes in your vision or eye health, you should schedule an appointment with your eye care professional immediately. This may include blurry vision, headaches, eye strain, and dryness, among other symptoms.

If you wear eyeglasses or contact lenses, your prescription may need to be updated more frequently than 1-2 years, depending on changes in your vision. It's important to follow your eye care professional's recommendations for when to schedule an eye exam and when to update your prescription.

In conclusion, eye prescriptions typically last 1-2 years, but the frequency of eye exams and prescription updates depends on personal factors. Maintaining regular eye care appointments and monitoring any changes in your vision or eye health is essential to ensuring the best possible vision and eye health.