IMProVe 2011 - Proceedings

Engineering Methods in Medicine
Development of procedures aimed at assisting lens designer when RGP lenses are to be
prescribed to a patient.
Method:
Procedures have been partly developed and partly adapted, (i) to choose the most
suitable lens shape category for a specific visual defect, and (ii) for determining lens
geometrical parameters. In some cases lens designer is asked to choose among two
alternatives.
Result:
The program covers all the more widespread lens categories and is ready for testing by the
potential users.
Discussion & Conclusion:
This work originates from the objective of reducing the number of trials before the
definitive lens is produced. The initial idea to develop a dedicated CAD/CAM system is at
the moment in standby, as lens manufacturers distrust optician solutions.
Keywords: DSS, contact lens design, RGP contact lenses
Corresponding Author: Luciano D’Angelo
Tel.: +39 0532 974885
Fax.: +39 0532 974870
e-mail: dal@unife.it
Address: via Saragat 1 Ferrara.
Shape modeling and analysis of a human eye based
on individual experimental data
S. Giovanzana (a), G. Savio (a), R. Meneghello (a), G. Concheri (a)
(a) DAUR – Laboratory of Design Tools and Methods in Industrial Engineering, University of Padova, Italy
Abstract:
Purpose:
The aim of this work is to develop a virtual environment for modeling and analysis an
individual virtual eye which is able to integrate the modern imaging techniques as input
data.
Method:
The virtual environment is developed in a 3D CAD by means of specific plug-ins due to the
ability of this software to manage freeform surfaces and to the simplicity in the scripts
implementation.
Result:
Spot of confusion analysis has been performed on two virtual eyes, with data derived from
literature and by topography measurements.
Discussion & Conclusion:
June 15 th – 17 th , 2011, Venice, Italy
121
IMProVe 2011 - Proceedings