Most Eye hospitals are set-up with a view to check general visual acuity and screen for all types of problems and diagnose & treat refractive errors, cataract and glaucoma. The reason is, these are eye problems most commonly found. Based on these cases, the most common medical equipment for eye hospital are Ophthal chair unit, autorefrator/ retinoscope, ophthalmoscope, tonometer, slit lamp, operating microscope, phaco machine.