Photinos Panas was an ophthalmologist who was born on the Greek island of Cefalonia. In 1860 he obtained his medical degree at Paris

Paris

Paris is the capital and largest city in France, situated on the river Seine, in northern France, at the heart of the Île-de-France region...

, where he would later spend his entire medical career. He was the first professor of ophthalmology

Ophthalmology

Ophthalmology is the branch of medicine that deals with the anatomy, physiology and diseases of the eye. An ophthalmologist is a specialist in medical and surgical eye problems...

 at the University of Paris

University of Paris

The University of Paris was a university located in Paris, France and one of the earliest to be established in Europe. It was founded in the mid 12th century, and officially recognized as a university probably between 1160 and 1250...

, and in 1879 established the ophthalmology clinic at the Hôtel-Dieu de Paris

Hôtel-Dieu de Paris

The Hôtel-Dieu de Paris is regarded as the oldest hospital in the city of Paris, France, and is the most central of the Assistance publique - hôpitaux de Paris hospitals. The hospital is linked to the Faculté de Médecine Paris-Descartes...

. In 1881 with Edmund Landolt

Edmund Landolt

Landolt, Edmund, was a Swiss ophthalmologist stationed in Paris, mostly known for a wide range of publications and his research in the field of ophthalmology.- First years :...

 (1846-1926) and Antonin Poncet

Antonin Poncet

Antonin Poncet was a French surgeon.He studied medicine in Lyon, where he served as interne des hôpitaux. He was a member of the Lyon ambulance corps during the Franco-Prussian War, and in 1878 became a member of the surgical section of the Lyon faculty of medicine...

 (1849-1913), he founded the Archives d'ophtalmologie.

In 1894 he published Traité des maladies des yeux, which at the time was considered to be the best French textbook on eye diseases. Panas is credited with introducing an operation for entropion

Entropion

Entropion is a medical condition in which the eyelid folds inward. It is very uncomfortable, as the eyelashes constantly rub against the cornea. Entropion is usually caused by genetic factors and may be congenital...

 in trichiasis

Trichiasis

Trichiasis is a medical term for abnormally positioned eyelashes that grow back toward the eye, touching the cornea or conjunctiva. This can be caused by infection, inflammation, autoimmune conditions, congenital defects, eyelid agenesis and trauma such as burns or eyelid injury.Standard treatment...

, as well as an operation for attachment of the upper eyelid

Eyelid

An eyelid is a thin fold of skin that covers and protects an eye. With the exception of the prepuce and the labia minora, it has the thinnest skin of the whole body. The levator palpebrae superioris muscle retracts the eyelid to "open" the eye. This can be either voluntarily or involuntarily...

 to the occipitofrontalis muscle

Occipitofrontalis muscle

The occipitofrontalis or epicranius is a muscle which covers parts of the skull. It consists of two parts or bellies: The occipital belly, near the occipital bone, and the frontal belly, near the frontal bone....

 for treatment of blepharoptosis. Each of these techniques is sometimes referred to as "Panas' operation" in medical literature.