These elegant reading glasses come in two strengths: +3.5 and +4.0.
These strengths are just slightly above what you would normally find in most drug stores.
Many people often confuse the strengths of reading lenses with those of handheld magnifiers. For example: a +3.0 reader is not equivalent to a 3X magnifier. A 3X magnifier is actually the same as a +12.0 reader. Glasses at that strength are only availble by prescription.