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 reader lenses with the strengths of handheld magnifiers. A +3.0 reader is not equivalent to a 3X magnifier, for example. A 3X magnifier is actually the same as a +12.0 reading glass. Glasses at that strength, though, are extremely difficult to use and oonly availble by prescription.