It's a good practice to periodically check and tighten the screws on your glasses to ensure that they remain secure and comfortable to wear. How often you should check and tighten the screws can depend on several factors, including how frequently you wear your glasses, your level of activity, and the quality of the frame and screws. Here are some general guidelines:

Regular Check-Up: Aim to check the screws on your glasses at least once a month. This routine can help you catch any loose screws early and prevent further issues.

Active Lifestyle: If you lead an active lifestyle or participate in activities that could put stress on your glasses (such as sports or physical work), you might need to check and tighten the screws more frequently. High-impact activities can cause screws to loosen faster.

New Glasses: After getting new glasses or having adjustments made, it's a good idea to check the screws more frequently during the initial weeks. Sometimes, adjustments can cause screws to become loose.

Loose Screws: If you notice any discomfort, wobbling, or asymmetry in your glasses, it's a sign that a screw might be loose. In such cases, tighten the screws as soon as possible.

Travel and Temperature Changes: When traveling to places with significant temperature changes or humidity, screws might expand or contract, leading to loosening. Check your glasses more often under such circumstances.

Prescription Changes: If you undergo a prescription change and need to replace lenses or adjust your frames, it's a good time to ensure all screws are properly tightened.

To tighten the screws on your glasses, you can use a small screwdriver designed for eyewear repair. If you're uncomfortable doing this yourself or if the screws are difficult to access, consider visiting an optician or eyewear professional. They have the tools and expertise to make adjustments and repairs.

Remember, preventive maintenance can help extend the lifespan of your glasses and keep them comfortable and functional. If you ever encounter stripped or damaged screws, it's important to have them replaced promptly to avoid further issues.