Which of the following terms is synonymous with 'eye' in the medical context?

In the medical context, the term 'ocular' is synonymous with 'eye.' It is derived from the Latin word 'oculus,' which directly refers to the eye. This term is commonly used in various medical fields, particularly in ophthalmology, where it pertains to anything related to the anatomy, function, and diseases of the eye.

The other terms, while related to vision and the eye, are not direct synonyms. "Optic" refers specifically to the optic nerve or vision-related functions, primarily dealing with the transmission of visual information from the eye to the brain. "Visual" pertains to the sense of sight or the process of seeing but does not directly refer to the eye itself. "Corneal" pertains specifically to the cornea, which is the transparent front part of the eye that covers the iris and pupil. Therefore, 'ocular' is the most appropriate term to denote the eye in a broader medical context.