Telescopic Contact Lens With Switchable Magnification To Help AMD Patients

Lister: Any problems?
Kryten: Well, just one or two. In fact I've compiled a little list if you'll indulge me. Now then, uh, my optical system doesn't appear to have a zoom function.
Lister: No, human eyes don't have a zoom.
Kryten: Well then, how do you bring a small object into sharp focus?
Lister: Well, you just move your head closer to the object.
Kryten: I see. Move your head... closer, hmm, to the object. All right, okay. Well, what about other optical effects, like split screen, slow motion?
Lister: No. W

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