It's recommended that you have an eye test every one to two years. This frequency is generally suitable for most people. However, factors such as age, overall health, and any existing eye conditions can influence how often you should schedule an exam.

Common symptoms of dry eye include:

• Burning or stinging sensation  
• Gritty or sandy feeling  
• Redness  
• Blurred vision  
• Sensitivity to light  
• Difficulty wearing contact lenses  
• Excessive tearing (paradoxically)  

If you're experiencing these symptoms, it's recommended to consult an optometrist for a proper diagnosis and treatment plan.

Children can typically get their first eye exam around the age of 6 months. This is when most babies start to develop basic visual skills. However, if you notice any signs of vision problems earlier, such as squinting, rubbing eyes, or turning heads to one side, it's best to consult an optometrist sooner.

A typical eye exam lasts between 30 and 60 minutes. However, the exact duration can vary depending on factors like your eye health history, the need for additional tests, and whether you're discussing new prescriptions or contact lenses.