Books like Optometric Instrumentation
David B. Henson
Optometric Instrumentation is 249 pages, about 4 hours 34 minutes at 250 words a minute.
6 books to read next
How long each takes
Primary Care Optometry 11.0 h 
Instrumental Methods of Analysis 14.4 h 
Ophthalmic Lenses and Dispensing 4.7 h 
Bennett and Rabbetts' Clinical Visual Optics 8.3 h 
Ultrasound Physics and Instrumentation 7.6 h 
Bennett and Rabbett's Clinical Visual Optics 9.0 h Bar height shows length. Estimated at 250 words a minute.