This is a program meant for secondary school use in either Physics of Biology lessons and is not available for home use. Although it could be used in the home, I think its use would be very limited indeed. The avowed aim of the package, consisting of two programs and a manual, is to demonstrate how the eye works, but I am not sure this is what it does at all.

I would expect a program aiming to do this would have some content on rods/cones and nerve transmission but what these programs do is show how light travels through the various parts of the eye and the resultant image on the retina. They do show this very clearly however.

I suppose the best description is that they provide an animated model of the eye and the paths of light through it. You can change almost all the parameters of distance from object, lens, thickness, iris opening, sight defects and in the second program insert various lenses to see their effect on the eye's focus. The model is clear and very simple to use but I'm not convinced the cost of the software, for such a narrowly aimed product, is justified.

I also have reservations about the documentation which is very strong on description but not on applications. There are a few suggested but they seem far from enough to make the package worthwhile. The best use of the programs may be to test the understanding of pupils who have already covered this area by setting it up to an unknown sight defect which by experiement they have to both correct and identify.

I feel that overall the package is adequate but disappointing. (Incidentally, the package will work on disc systems, despite the warnings that it will not, if a relocation routine is used.)