What is the definition or description of: infection of the back of the eye?

Intra eye infection: This means that an active infection is inside the eye. This can be from something that spread from a foreign body that got into the eyeor developed after eye surgery. It also could be metastatic spread from another part of the body or even from an std.

Infection in eye: "infection in the back of the eye" probably refers to a bacterial infection internally within the eye, as opposed to an external infection such as "pink eye". This is also known as enophthalmitis. It can happen after penetrating eye trauma, after eye surgery, or even spread from infection within the body through the blood. Treatment is with internally injected antibiotics and sometimes surgery.

Infection: Infection of the back of the eye likely refers to endophthalmitis, vitritis, retinitis, choroiditis, or neuroretinitis. These issues occur when an organism grows where they are not supposed to in the back of the eye and causes destruction of the structures.