How to wear suitable glasses for contact lenses? In time and method. How many degrees is the contact lens lower than the frame? What effect will it have if it is higher?

If you wear contact lenses with good oxygen permeability, the time of wearing contact lenses should not exceed 12 hours every day, and it is best to control them within 8 hours. Because wearing it for too long will lead to long-term hypoxia of the cornea. It is recommended to wear a pair of frame glasses while using contact lenses. Take off your contact lenses and put on your glasses when you get home from work every day. It is best to set aside one or two days a week to use frame glasses to rest the cornea and delay the process of injury.

For myopia below 400 degrees, the degree of frame glasses is the same as that of contact lenses.

If the power of frame lens is 4.00D to 5.00D, the power of contact lens is: myopia decreases by 0.25D, hyperopia increases by 0.25 d.

If the lens power is between 5.00 d and 7.00 d, the contact lens power is: myopia decreases by 0.50D and hyperopia increases by 0.50 d.

If the lens power is between 7.00 d and 9.00 d, the contact lens power is: myopia decreases by 0.75D and hyperopia increases by 0.75 d.

If the diopter of the frame lens ranges from 9.00D to/||||| 0/|||| 0/.00d, then the diopter of the contact lens is: myopia decreases/|||| 0/.00d and hyperopia increases/||||| 0/.00d. ..

If the glasses are too high, you will feel dizzy and uncomfortable.