LEADER 00000nam  22003617a 4500 
001    MODID-00000000001_APPID-00000001214_ACID-000000000062793 
003    ScCtBLL 
005    20150320053225.0 
008    821218s1900    paua          000 0 eng   
010       00005170 
040    ScCtBLL|beng|cScCtBLL 
042    premarc 
050 00 RE925|b.T5 
100 1  Thorington, James,|d1858-1944. 
245 10 Refraction and how to refract :|bincluding sections on 
       optics, retinoscopy, the fitting of spectacles and 
       eyeglasses, etc /|cJames Thorington. 
250    2d ed. 
264  1 Philadelphia :|bBlakiston,|c1900. 
300    1 online resource (328 pages). 
336    text|btxt|2rdacontent 
337    computer|bc|2rdamedia 
338    online resource|bcr|2rdacarrier 
490 1  Spectacular Spectacles anthology 
500    Microfilmed for preservation|5DNLM 
500    Original document: Book. 
500    GMD: electronic resource. 
520    When a wave goes through a differentℓmedium, it undergoes 
       a change in direction; this is called 
       refraction.ℓRefraction and How To Refract is aimed at 
       beginner audiences who hope to understand the refraction 
       process better. This is especially useful knowledge for 
       students of ophthalmology because refraction is a vital 
       process of the visual system. Glasses, by presenting a 
       barrier between the outside world and the eye, change the 
       refraction process of a naked eye. 
650  0 Eye|xExamination. 
650  0 Eye|xAccommodation and refraction. 
830  0 Spectacular Spectacles anthology. 
830  0 BiblioBoard Core module. 
914    MODID-00000000001_APPID-00000001214_ACID-000000000062793