{"id":216302,"date":"2026-05-04T11:44:13","date_gmt":"2026-05-04T15:44:13","guid":{"rendered":"https:\/\/www.hajim.rochester.edu\/senior-design-day\/?p=216302"},"modified":"2026-05-05T10:09:59","modified_gmt":"2026-05-05T14:09:59","slug":"lift-lens-interaction-force-tester","status":"publish","type":"post","link":"https:\/\/www.hajim.rochester.edu\/senior-design-day\/lift-lens-interaction-force-tester\/","title":{"rendered":"LIFT: Lens Interaction Force Tester"},"content":{"rendered":"\n
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Introduction<\/h2>\n\n\n\n

Millions of Americans wear soft contact lenses, but there is currently no method of quantifying contact lens attachment to the eye. As a result, Bausch + Lomb has requested a testing platform to better understand the forces that are responsible for the attachment of a contact lens to the eye. Since lens attachment is directly correlated with patient comfort, understanding these forces will inform lens design and improve product output.<\/p>\n\n\n\n

Our team has designed a physical device to measure the removal force between a contact lens and a model eye. Our ultimate goal with this device is to reduce the number of lens designs that require revision following a clinical trial.<\/p>\n\n\n\n

Conceptual Overview<\/h2>\n\n\n\n

The contact lens primarily rests on the cornea, the transparent outer layer of the eyeball that protects the eye and provides its focusing power [1]. <\/p>\n\n\n\n

Multiple forces are responsible for keeping the contact lens attached to and centered on the cornea. Suction pressure, the net negative pressure that develops because of tear film beneath the lens, is thought to be the primary driver of lens attachment. At the molecular level, adhesive forces are also involved in modulating the interactions between the contact lens, tear film, and cornea. Lastly, the lens is elastic, so the deformability also affects how the lens interacts with the eye [2]. By investigating the overall removal force of the contact lens, we aim to provide B+L with a big-picture overview of the interplay between these forces. <\/p>\n\n\n

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Systems Level Overview<\/h2>\n\n\n\n
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