LABORATORY MANUAL OF PHYSIOLOGY. 



* red m the purple or related colors, but will dassify these 

 te reds wul be confused with the greens. 



the ere, in a state of rest, 



* - ^ , , , .,,_,,__ + 



- - _ . . .. : . - ; 



t condition of 



(tar si-htedness) is that form of 

 eye, when at rest, focusses parallel rays of 

 It is corrected bj placing before the eye 

 . Why? Make a diagram. 



arH9gfatedness) is that fonn of ametropia in which 

 at T1p ^ t J , fc* imy^ pnolifi ravs of i^ht in front of the 

 It is Maintrtl bj pbring before flic eye a concave fens. 

 Why? Make a dbgram. 



of ametropia in which the eye, when 

 rajs of fight upon any one spot, 

 rays of fight, coming through different 



to 2 mOOQS ffl CnKKflnCOK DHUICS* 'DCfDCD' 



depending upon the 



in which the rays of light, 

 are equally refracted in all parts 

 of Ac rriifa. bat the refraction of at least two meridians is 



in which the various parts 



is that form in winch the rays 

 are brought to a focus on 

 through the otiier principal meridian 

 a point back of the retina. 

 Cempemd kyptropu astigmatism is that form in which the 



