Original sentence: Graduates of ophthalmology residency programs can receive further in subspecialties of ophthalmology such as neuro-ophthalmology, etc... by completing a fellowship program which varies in length depending on each program's requirement
Edited sentence: Graduates of residency programs can receive further in subspecialties of ophthalmology such as neuro-ophthalmology, etc... by completing a fellowship program which varies in length depending on each program's requirement