FYFS +75/+125/+175/ +275 Sports Photochromic Reading Glasses for Men Anti Blue Light Ultra Light Color Changing Presbyopia Glasses Square Cycling High-end Feeling Long Sighted Glasses with Grade

Please note before placing an order:1. Please expose to sunlight for more than 10 seconds, and then observe the discoloration effect of the torn film on the lens.2. Color changing lenses only change color when exposed to sunlight. The stronger the light, the better the color changing effect!3. It will not change color when there is no sunlight on cloudy days and cool places. The sunlight must shine on the lens!4.When there is no sunlight, the lens can change color through ultraviolet radiation!5. People who receive packages at night and in the evening can undergo a third test!6. Please do not conduct testing indoorsDegrees:+100 degrees (under 50 years old is recommended),+150 degrees (50-54 years old is recommended),+200 degrees (55-59 years old is recommended),+250 degrees (60-64 years old is recommended),+300 degrees (65-69 years old is recommended),+350 degrees (70-74 years oldis recommended),+400 degrees (over 74 years old is recommended)