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Multiple errors - BEWARE
on 16 September 2012
I am about to sit FRCOphth part 1. While this book is the recommended optics text, covering the syllabus topic by topic, it has several errors in it which I find very worrying.
The thin lens formula should be 1/f =1/u + 1/v
The AC/A ratio formula is incorrect. It should be AC/A = (Dnear - Ddistance)/D. The book has it the other way round (Ddistance -Dnear)
The diagram for the direct ophthalmoscope and effect of pupil size is flawed because it treats the pupil aperture as a refractive interface (the light rays are bending at the pupil: WHY???). It is possible it is a reduced diagram treating the whole eye as 'one lens' but by having the nodal point within the pupil the author has made it confusing.
Get your act together Elkington et al...
A better text book is Essential Optics Review for the Boards by Wilkinson (American textbook).