Therefore, I wear a single contact lens, so I have near vision in one eye and far vision in the other . ( There supposedly are bifocal contact lens, but I am skeptical about how well they might work, so haven't tried them yet . ) talk ) 16 : 17, 1 October 2016 ( UTC)
42.
Go macro ( close up or near vision ) and slight changes makes for so-much-change that you need to stop the lens right down in order to accommodate the whole image from front to back . . . Look at the images in the link from the talk ) 21 : 26, 24 September 2010 ( UTC)
43.
The product offering has expanded and now includes wood burning stoves, reading / near vision glasses, UV protection eyeglasses ( January 2005 ), eye drops ( January 2006 ), water purification buckets ( December 2008 ), vegetable seeds ( January 2008 ), energy efficient light bulbs ( January 2008 ), and solar lamps ( January 2010 ).
