Abstract
This study uses matrix optics to develop a model to predict depth of field in eyes
that may have astigmatic elements and apertures that may be elliptical in general. Depth of
field is modelled as the visual acuity (VA) as a function of working distance and is illustrated
graphically for model eyes that have artificial intraocular pinhole apertures. A small amount of
residual myopia is an advantage to increasing the depth of field at near without interfering with
distance-vision. A small amount of residual astigmatism is not an advantage to increasing depth
of field, without compromising VA at all distances.