The book allows access to the disorder either anatomically or by classification of the disorder. Once the reader is in the proper section, a list of the more common entities is available with a concise description, diagnostic laboratory, and treatment. Some ophthalmologic disorders can only be diagnosed by clinical observation. In these cases a detailed physical description of the entity is listed. Ptosis, for example, has large categories of congenital and adult-onset ptosis. These disease entities are divided into age of onset and then a descriptive list of possible causes are listed under each category.Although drug dosages and methods of administration have been scrutinized, it is important that each physician exercise his or her own judgment in the choice or use of a drug. The physician is advised to check the product information included in the drug’s package insert before drug administration. New data and individual clinical situations can change the drug regimen.