37B DISORDERS 



different diseases of the eyes, whether as na- 

 tural blemishes, hereditary defects, or pro- 

 ceeding from external injuries. Such list 

 might be very much extended by enlarging 

 distinctly upon the remote and separate dis- 

 orders ; as the giiffaserena, cataract, Jibiiy &c. 

 but as relief is rarely obtained in these cases, 

 a very minute and extensive description of 

 the component parts that constitute the 

 cause, can add but little, if any, to the ge- 

 neral informatioKL 



The gutta serena is a partial or universal 

 loss of sight, where no palpable defect or 

 fault appears in the eye, except^ that the 

 pupil n a little more enlarged or contracted. 

 The appearances of this blemish are various, 

 ' as well as the causes and effects, some of ifs 

 subjects being totally blind, and others 

 barely enabled to distinguish between light 

 and darkness. The signs are a^ blackness of 

 the pupil of the eye, its size being larger or 

 less than usual, according to the cause, and 

 its not contracting or dilating upon a sudden 

 exposure to any degree of light. In order to 

 the cure, attend to the cause as the first step 

 to an administration of medicine, from which. 



