A Water Balloon Eye Model for Teaching about the Human Eye

Kwok-Chi Lau

doi:10.1525/abt.2020.82.5.341

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Kwok-Chi Lau¹

¹Kwok-Chi Lau is a Professor in the Department of Curriculum and Instruction, Chinese University of Hong Kong, Shatin, Hong Kong; e-mail: laukwokchi@cuhk.edu.hk.

Abstract

A physical eye model made of a water balloon and a convex lens is described. It can be used to model how an image is formed in the eye as well as shortsightedness and farsightedness. The model is unique in featuring a fluid-filled “eyeball” with “intraocular pressure,” making it a useful tool for teaching about accommodation and glaucoma. Instructional ideas for the model are suggested.

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Citation Download Citation

Kwok-Chi Lau "A Water Balloon Eye Model for Teaching about the Human Eye," The American Biology Teacher 82(5), 341-343, (17 July 2020). https://doi.org/10.1525/abt.2020.82.5.341

Published: 17 July 2020