[DOC] [TLE] Bifocals - Wikipedia [PAR] Bifocals are eyeglasses with two distinct optical powers. Bifocals are commonly 
prescribed to ... Benjamin Franklin is generally credited with the invention of 
bifocals. ... Today most bifocals are created by molding a reading segment into a 
primary lens and are available with the reading segments in a variety of shapes 
and... [DOC] [TLE] Reading Glasses - What You Should Know - AllAboutVision.com [PAR] Reading glasses come in two main styles: full frames, in which the entire lens is 
made in the reading prescription, and half-eyes, the smaller "Ben Franklin" style... [DOC] [TLE] Benjamin Franklin-Father of the Bifocal [PAR] It presented Benjamin Franklin as the inventor of bifocals. ... Compound 
corrective lenses, usually bifocals or trifocals, and with ... I had the glasses cut 
and half of each kind associated in the same circle, thus .... He had invented 
these with the distance prescription fixed in a frame attached to the top of each 
reading glass. [DOC] [TLE] The 'inventor' of bifocals? - The College of Optometrists [PAR] Why it is wrong to say Benjamin Franklin 'invented' bifocals. ... Franklin has long 
been credited with the invention of bifocal spectacle lenses, but ... best at the 
distance proper for reading, is not the best for greater distances. ... A modern 
replica pair of the type of split bifocal spectacles known to have been worn by 
Benjamin... [DOC] [TLE] Spectacle Lens Designs - Rosin Eyecare [PAR] These lenses, thought to be invented by Benjamin Franklin, were developed to 
correct vision of 2 focal distances; one type of lens to correct for images .... 
designed for computer distance and the lower portion of the lens designed for 
reading. [DOC] [TLE] Find Out About Different Lenses & Their Coatings [PAR] Learn about lens types as well the eyeglass lens treatments available to ... 
Bifocal lenses have two parts: the upper part normally used for distance ... People 
with presbyopia need a prescription lens for reading and may need a ... Benjamin 
Franklin invented bifocals so he wouldn't need to switch glasses when reading. [DOC] [TLE] Reading Glasses - Gailmard Eye Center [PAR] Are you someone who never needed glasses before, but you now can't read a ... 
half-eyes - the smaller "Ben Franklin" style glasses that sit low on the nose. ... for 
distance vision, and the bottom portion of the lens contains the reading 
prescription. ... Because these readers are mass-produced, the optical quality of 
the lenses... [DOC] [TLE] Presbyopia: Why Bifocals? - University of Illinois College ... [PAR] Nearsighted people may need to take off their distance glasses to read. ... who do 
not need distance correction or who wear contact lenses for distance. ... Bifocals 
have come a long way since Benjamin Franklin invented them in the 1700s. ... In 
the area of blending, some blurry vision results, which can make this type of... [DOC] [TLE] Eye glass lenses and coatings options [PAR] These coatings are especially useful for those viewing computer screens and ... A 
little-known fact is that bifocals were invented by Benjamin Franklin, and his style 
of ... have developed a new type of lens, called the no-line, or progressive, lens. 
.... for reading makes it difficult to focus on objects at intermediate distances,... [DOC] [TLE] Eyeglasses History - Origins of Glasses and Sunglasses [PAR] The first wearable glasses were made in Italy around 1285-1289. They were 
crude and ... The inventor of the first spectacle lenses is unknown. Roman ... 
These reading stones were similar to hand-held magnifying lenses of today. Most 
historians ... (as in reading)). They were the first devised by Benjamin Franklin in 
1784. [DOC] [TLE] Eyeglasses - New World Encyclopedia [PAR] Oct 12, 2013 ... Safety glasses are a kind of eye protection against flying debris or ... The 
American scientist Benjamin Franklin, who suffered from both myopia and 
presbyopia, invented .... These were originally separate lenses, as invented by 
Benjamin ... one for each task or distance, with specific glasses for reading,... [DOC] [TLE] Eyeglasses: Cheap Glasses  Reading Glasses

Question: Ben Franklin invented these kinds of optical lenses for distance & reading
Answer: bifocals