Excessive use of contact lenses for long periods of time can cause eye problems. As a typical example, corneitis, conjunctivitis, etc. can cause problems. To reduce these side effects, contact lenses should be reduced and glasses should be used in parallel. Use glasses whenever possible when you get home after outdoor activities. Occasionally, you should wear contact lenses when sleeping and remove contact lenses when sleeping. Oxygen transmission in the eyes may decrease, causing side effects of corneal edema. For the sake of the health of your eyes, we recommend that you use it in parallel with your glasses.