There are two type of glaucoma called open angle and closed angle. Describe how each is treated. Compare and contrast what is measured by visual acuity and by refraction. An initial refraction can be accomplished with a procedure called retinoscopy. However, this must be fine tuned with another procedure.
Tonometers measure the intraocular pressure.
If you have ever tried to look into someone's eye by peering into their pupil, you realize that its too dark in there to see in. Hermann von Helmholtz invented a device called the ophthalmoscope that allows us to see inside of the eye. Describe how an ophthalmoscope works. You may want to include a diagram along with your description. Describe how you would carry out an eye examination in a patient to try to determine the critical locus that might account for the fact that the patient cannot read an eye chart.