Refraction difficulties.
Subtitle: Prepared for the use of graduates in medicine.
Edition: [3d ed.]
Publisher: American Academy of Ophthalmology and Otolaryngology, Section on Instruction, Home Study Courses
Published: 1957
Place of publication: [Rochester, Minn.]
Language: eng
Number of pages: 37
Subjects: Eye -- Accommodation and refraction; Eyeglasses