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Digital soft contact lenses design and validation


Project Description

Soft contact lenses are medical devices largely used to correct the eye refractive error for more than 125 million people worldwide. Unlike spectacle lenses which are used in conventional glasses, soft contact lenses should be designed to fit the user’s eye beside being able to correct his vision. During the fitting process, the surface of the contact lens deflects to fit the eye shape, therefore, the optical power of the soft lens on-eye differs from the one originally manufactured and tested off-eye.

In this project, the student will design the geometry and select the materials of a range of contact lenses then test their optical power before and after the fitting process. The product design process will be carried out by a MATLAB software code, however, the process of fitting contact lenses to human eyes will be simulated by FE-BIO finite element software where the 3D change in the shape of a contact lens can be monitored and recorded. The student will then use knowledge gained from this exercise to obtain correction factors that can be used to take the deflection of soft contact lenses in account when design contact lenses.

To apply for this opportunity, please visit: https://www.liverpool.ac.uk/study/postgraduate-research/how-to-apply/

Funding Notes

Student will need to cover their own tuition fees and living expenses.

References

Simulated optical performance of soft contact lenses on the eye, Abass, A., Stuart, S., Lopes, B. T., Zhou, D., Geraghty, B., Wu, R., Elsheikh, A. (2019). Simulated optical performance of soft contact lenses on the eye. PLOS ONE, 14(5). doi:10.1371/journal.pone.0216484
Non-Orthogonal Refractive Lenses for Non-Orthogonal Astigmatic Eyes, Abass, A., Lopes, B. T., Jones, S., White, L., Clamp, J., & Elsheikh, A. (2019). Non-Orthogonal Refractive Lenses for Non-Orthogonal Astigmatic Eyes.. Current eye research, 1-9. doi:10.1080/02713683.2019.1589523
Positions of Ocular Geometrical and Visual Axes in Brazilian, Chinese and Italian Populations, Abass, A., Vinciguerra, R., Lopes, B. T., Bao, F., Vinciguerra, P., Ambrosio Jr, R., & Elsheikh, A. (2018). Positions of Ocular Geometrical and Visual Axes in Brazilian, Chinese and Italian Populations. Current eye research, 43(11), 1404-1414. doi:10.1080/02713683.2018.1500609

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