1. The Visual Fields: A Textbook and Atlas of Clinical Perimetry;Harrington,1981
2. Testing the Field of Vision;Anderson,1982
3. A new technique of visual field evaluation for unilateral ptosis;Perlstein;Ann Ophthalmol,1983
4. Ptosis surgery;Iliff,1992
5. Evaluation and management of the ptosis patient;Waller,1987