Convex-lens aids. A: Spectacle magnifiers

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Presentation transcript:

Convex-lens aids. A: Spectacle magnifiers Convex-lens aids. A: Spectacle magnifiers. B: Spectacle-mounted magnifiers. C: High-power reading spectacles with prisms to reduce the requirement for convergence. D and E: Dome magnifiers. F: Hand magnifiers of various strengths. G: Hand magnifier in use. H: Hand magnifiers suitable for carrying in a pocket or purse. I: Illuminated hand magnifiers of various strengths. J–L: Illuminated hand magnifiers with LED blue, green, and yellow light. M: Fixed focus stand magnifier, allowing writing on the material being read. Source: Low Vision, Vaughan & Asbury's General Ophthalmology, 19e Citation: Riordan-Eva P, Augsburger JJ. Vaughan & Asbury's General Ophthalmology, 19e; 2017 Available at: http://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/2186/vaughan19_ch24_f004b-1.png&sec=165520103&BookID=2186&ChapterSecID=165520065&imagename= Accessed: November 12, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved