What does the size of the lens diameter mean?

If you look at the lens, it says the size of the diameterYo

What does this mean?

Is the lens size different?

587 2018-12-21 Lady

popular Why does it say that your license has expired on your phone?

popular Is hair spray not allowed on the plane at all?

popular How can I resolve TLS security configuration errors?

popular What is the nationality of Minnie?

popular What are the side effects of oats?

Same Tag Please recommend lenses with high oxygen permeability

Same Tag Which one is good for astigmatism lenses?

Same Tag Would it be better to have a Panasonic G7 lens to prevent hand tremors?

Same Tag Can I wear color lenses when I take ID photos?

Same Tag Do you sell Canon lens caps separately?

Same Time Does the swelling go down a lot after you loosen the double eyelid thread?

Same Time What does the size of the lens diameter mean?

Same Time My dark circles are really bad, so how can I cover this?