Harvey, P A <br/><br/>
Demonstrating astigmatism.  [electronic resource] 

 -  Eye (London, England)  1996 
 - 750 p.  digital 
<br/><br/> Publication Type: Letter 
<br/><br/><label>ISSN: </label>0950-222X 
<br/><br/><label>Standard No.: </label>10.1038/eye.1996.175  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astigmatism<br/>Humans<br/>Ophthalmology--education