You can easily search a majority of the Penn Libraries journal titles about Endocrine/Oncological Surgery Surgery in Browzine.
Ophthalmology — Medical Specialties O-Z — University of Pennsylvania — BrowZine
Eye Diseases — Diseases — University of Pennsylvania — BrowZine
Below are direct links to a selection of these titles.
Albert and Jakobiec's Principles and Practice of Ophthalmology by 
Laser Techniques in Ophthalmology: A Guide to YAG and Photothermal Laser Treatments in Clinics by 
