Numerical Modelling of Accommodation and Presbyopia (1999-2002)

Dr Harvey Burd, Dr Stuart Judge, Mr Jac Cross

A study has been conducted on using numerical procedures to model accommodation and the development of presbyopia (Burd, Judge and Cross, 2002; Judge and Burd, 2002). An outline of the modelling procedure used in the study is shown in the figure

Axisymmetric finite element model of the lens (Burd et al. 2002)

The study was conducted using a non-linear finite element program (ABAQUS) in which the effects of geometrical non-linearity are included. This procedure is capable of modelling the shape changes occurring in the lens during accommodation, as shown below.

Finite element analysis of a 29-year lens

Downloads

The ABAQUS input file used to conduct one of the analyses in Burd, Judge and Cross (2002) may be downloaded by clicking here. This file corresponds to the 29 year Mesh B analysis illustrated in Fig 4(b) of the paper.

Publications

• Judge, S.J. and Burd, H.J. (2002) Modelling the Mechanics of Accommodation and Presbyopia. Ophthal. Physiol. Opt. 22, 397-300
• Burd, H.J., Judge, S.J. and Cross, J.A. (2002) Numerical Modelling of the Accommodating Lens. Vision Research 42, 2235-2251
• Burd, H.J., Judge, S.J. and Cross, J.A. (1999) Numerical modelling of ocular accommodation. (ARVO Abstract) Investigative Ophthalmology and Visual Science, 40(4), Abstract No. 4678
• Burd, H.J., Judge, S.J. and Flavell, M.J. (1999) Mechanics of Accommodation of the Human Eye. Vision Research 39, 1591-1595