Astigmatism, a common eye defect
Keywords
astigmatism,
anatomy,
eye,
cornea,
opthalmology,
optometry,
eye doctor,
optical,
optical store,
sight,
common,
disorder,
condition,
oval,
sphere,
retina,
vision,
sharpened,
focal point,
optical,
biology,
medicals,
lens,
medicine,
cross section,
sensory organ,
iris,
health care,
science,
human,
diagram,
health,
illustration