1.56 can be considered below 300 degrees, and 1.60 can be considered if it is finer. 300-500 degrees, 1.60 can be considered, and a little finer can be considered 1.67. 500- 1000 degrees, thinner, consider 1.7 1. 1000 degrees above 1.7 1, and a little finer is 1.74.

Glasses protection:

1. One-handed disassembly will destroy the balance of the left and right sides of the mirror frame, resulting in deformation. It is recommended that your hands take off the temples along the parallel direction on both sides of your cheeks.

2. Generally, the left temple is folded first when taking it, which is not easy to cause the deformation of the mirror frame.

3. It is suggested to rinse the glasses with clear water, absorb the water with a paper towel, and then try to wipe them with a special glasses cloth. It is necessary to hold the edge wire of the mirror frame on one side of the wiping mirror and gently wipe the lens to avoid damaging the mirror frame or lens with excessive force.

When you don't wear glasses, please wrap them in glasses cloth and put them in the glasses case. If temporarily placed, please put the convex surface of the glasses upward, otherwise it is easy to wear out the lenses. At the same time, glasses should avoid contact with insect repellent, toilet cleaning supplies, cosmetics, hair gel, medicines and other corrosive substances, and avoid long-term direct sunlight and high temperature (above 60℃), otherwise it will easily lead to deterioration, deterioration and discoloration of lenses and frames.

5. Go to the store regularly for plastic adjustment. The deformation of the mirror frame will burden the nose and ears, and the lens is easy to loosen.

6. Please don't use glasses during strenuous exercise, so as not to break the glasses due to strong impact, causing eye and face damage; Do not use worn lenses to prevent vision loss caused by scattered light; Please don't look directly at the sun or glare, so as not to hurt your eyes.

For more information about glasses, I recommend Guiyang Aier Eye Hospital. Aier Ophthalmology has seven research institutes, including Aier Ophthalmology Research Institute, Aier Ophthalmology Research Institute, Corneal Disease Research Institute, Cataract Research Institute, Glaucoma Research Institute, Retina Research Institute and Refraction Research Institute, aiming at promoting the research and innovation of ophthalmology, visual science and cutting-edge and clinical application technologies in various sub-disciplines, and serving patients more intimately and comprehensively. Welcome to click for details.