On 27 November 2012 20:18, Joseph McAllister <pentax...@mac.com> wrote: > In astronomy that filter is known as a corrector plate. If it corrects…
That's how I discovered I needed eye-glasses. One day I put on some safety glasses to use a power tool. Everthing became a little clearer which didn't make sense, especially as the safety glasses were presumably plain lenses, but there was enough of something happening to merit a follow-up at an optometrist. I've worn glasses ever since. regards, Anthony -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
