Getting Stronger: Discussion Forum

Discussion Topics => Rehabilitation => : caimanjosh January 23, 2014, 11:38:59 AM

: "stacking" plus lenses
: caimanjosh January 23, 2014, 11:38:59 AM
I've been wondering something about the use of plus lenses.  Can you "stack" 2 lenses together in order to produce a more powerful lens?  For example, say you have a +1 and a +2 lens, and you want to have a +3 lens.  Can you put the two lenses together and end up with +3 diopters of correction when you look through them?  Or does it not work that way?  Anyone experimented with this?  I'd like to avoid buying any more reading glasses and just make use of the ones I have as my eyes progress. 
: Re: "stacking" plus lenses
: chris1213 January 23, 2014, 09:38:13 PM
As far as I know, yes you can. Just like you can 'stack' two minus lenses to get a greater negative number, you can also 'stack' the plus lenses to get a greater plus number.