Linked from
The 8 pages that link to Eyepiece, each with the reason it gives.
Optical telescopeRelated: An eyepiece lets a visual telescope magnify its objective’s image.
BinocularsRelated: It magnifies the intermediate image produced inside each telescope.
Compound microscopeRelated: It magnifies the intermediate image produced by the objective.
Objective lensRelated: It magnifies or relays the primary image created by the objective.
Optical microscopeBroader topic: It magnifies the intermediate image formed by the objective.