title: Quantification on the pinhold effect.
abstract: Can the pinhold principle be practically applied to solving the problem of providing useful vision for aphakics without resorting to aphakic spectacles? The authors have experimentally quantified the pinhold effect and concluded that the pinhold, successfully produced by miotics in certain patients or by a thin, dyed contact lens, may have clinical value.
mesh_terms: D003263:Contact Lenses, Hydrophilic / Q000592:standards; D005128:Eye Diseases / Q000628:therapy; D006801:Humans; D007908:Lens, Crystalline; D008916:Miotics / Q000494:pharmacology / Q000627:therapeutic use; D010862:Pilocarpine / Q000494:pharmacology / Q000627:therapeutic use; D011680:Pupil / Q000187:drug effects; D012029:Refraction, Ocular; D014792:Visual Acuity
chemical_list: D008916:Miotics; D010862:Pilocarpine