If you accidentally leave eyeglasses in a refrigerator for a few minutes while the door is open, it should not cause any significant harm or damage to the glasses. Refrigerators are not extremely cold, and a few minutes of exposure to the slightly lower temperature inside the fridge with the door open should not have any adverse effects on your eyeglasses.
Eyeglasses are generally made from durable materials such as plastic or metal, and they are designed to withstand normal temperature variations without any issues. However, it's essential to avoid extreme temperature changes, as that could potentially cause damage over time.
Here are a few points to keep in mind:
Condensation: When you bring the eyeglasses from a warmer environment into a colder one (like the refrigerator), you may notice some condensation forming on the lenses due to the temperature difference. This is normal and should clear up on its own once the glasses return to room temperature.
Lens Coatings: Some eyeglasses have special coatings (e.g., anti-reflective coating, scratch-resistant coating). While a short exposure to the cold refrigerator air should not be a problem, prolonged exposure to extreme temperatures might affect these coatings over time.
Extreme Temperature Changes: Avoid exposing your glasses to sudden and extreme temperature changes, such as putting them in the freezer or leaving them in a hot car. Drastic temperature shifts could potentially cause the materials to contract or expand abruptly, leading to small cracks or warping.
To maintain your eyeglasses in good condition, it's generally best to store them at room temperature and avoid exposing them to extreme temperatures. If you notice any issues with your glasses after accidental exposure to the refrigerator, such as distortion or damage to the coatings, it's a good idea to visit an optician to have them checked and possibly repaired or replaced if necessary.