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An eye care professional uses a phoropter to detect refractive errors in a teenage patient. Description: An eye care professional uses a phoropter to detect refractive errors in a teenage patient..
Credit: National Eye Institute, National Institutes of Health
Ref#: EE66
 72 dpi
(568K, TIFF)
150 dpi
(2.4M, TIFF)
300 dpi
(9M, TIFF)
An eye care professional uses a trial frame and lens to determine a patient’s eyeglass prescription. Description: An eye care professional uses a trial frame and lens to determine a patient’s eyeglass prescription.
Credit: National Eye Institute, National Institutes of Health
Ref#: EE68
 72 dpi
(568K, TIFF)
150 dpi
(2.4M, TIFF)
300 dpi
(9M, TIFF)
An eye care professional uses a phoropter to detect refractive errors. Description: An eye care professional uses a phoropter to detect refractive errors.
Credit: National Eye Institute, National Institutes of Health
Ref#: EE71
 72 dpi
(568K, TIFF)
150 dpi
(2.4M, TIFF)
300 dpi
(9M, TIFF)
The manual refractor contains convex and concave spherical lenses and convex cylindrical lenses. Description: The manual refractor contains convex and concave spherical lenses and convex cylindrical lenses.
Credit: National Eye Institute, National Institutes of Health
Ref#: EE65
 72 dpi
(2.7M, TIFF)
150 dpi
(2.7M, TIFF)
300 dpi
(2.7M, TIFF)
An NEI-certified ophthalmic technician uses the ETDRS eye chart Description: An NEI-certified ophthalmic technician uses the ETDRS eye chart to perform refractometry to obtain the best corrected visual acuity of each eye.
Credit: National Eye Institute, National Institutes of Health
Ref#: EE64
 72 dpi
(560K, TIFF)
150 dpi
(2.3M, TIFF)
300 dpi
(9M, TIFF)
Women taking eye exam Description: A phoropter is a machine used to detect refractive errors.
Credit: National Eye Institute, National Institutes of Health
Ref#: EE06
 72 dpi
(358K, TIFF)
150 dpi
(1.5M, TIFF)
300 dpi
(6.0M, TIFF)
Man behing a phoroptor Description: A phoroptor measures the prescription for corrective lenses.
Credit: National Eye Institute, National Institutes of Health
Ref#: EE08
 72 dpi
(377K, TIFF)
150 dpi
(1.6M, TIFF)
300 dpi
(6.4M, TIFF)
Child's Eye Exam - Lenses placed in a trial frame help determine eyeglass prescription. Description: Child's Eye Exam - Lenses placed in a trial frame help determine eyeglass prescription.
Credit: National Eye Institute, National Institutes of Health
Ref#: EE09
 72 dpi
(372K, TIFF)
150 dpi
(1.6M, TIFF)
300 dpi
(6.3M, TIFF)
A patient wears a trial frame and lenses. Description: A patient wears a trial frame and lens.
Credit: National Eye Institute, National Institutes of Health
Ref#: EE47
 72 dpi
(332K, TIFF)
150 dpi
(336K, TIFF)
300 dpi
(1.26M, TIFF)
A phoropter is a machine used to detect refractive errors. Description: A phoropter is a machine used to detect refractive errors.
Credit: National Eye Institute, National Institutes of Health
Ref#: EE22
 72 dpi
(334K, TIFF)
150 dpi
(659K, TIFF)
300 dpi
(2.6M, TIFF)
An eye care professional tests a patient's close-up vision. Description: An eye care professional tests a patient's close-up vision.
Credit: National Eye Institute, National Institutes of Health
Ref#: EE24
 72 dpi
(329K, TIFF)
150 dpi
(649K, TIFF)
300 dpi
(2.6M, TIFF)
A phoropter is a machine used to detect refractive errors. Description: An eye care professional uses a phoropter to detect refractive errors.
Credit: National Eye Institute, National Institutes of Health
Ref#: EE31
 72 dpi
(334K, TIFF)
150 dpi
(657K, TIFF)
300 dpi
(2.6M, TIFF)
An eye care professional tests a patient's near vision. Description: An eye care professional tests a patient's near vision.
Credit: National Eye Institute, National Institutes of Health
Ref#: EE41
 72 dpi
(335K, TIFF)
150 dpi
(338K, TIFF)
300 dpi
(1.3M, TIFF)
A phoropter is a machine used to detect refractive errors. Description: A phoropter is a machine used to detect refractive errors.
Credit: National Eye Institute, National Institutes of Health
Ref#: EE42
 72 dpi
(339K, TIFF)
150 dpi
(342K, TIFF)
300 dpi
(1.3M, TIFF)
A scene as it might be viewed by a person with myopia (nearsightedness). Description: A scene as it might be viewed by a person with myopia (nearsightedness).

Normal view of this image.
Credit: National Eye Institute, National Institutes of Health
Ref#: EDS06

 72 dpi
(460K, TIFF)
150 dpi
(2.0M, TIFF)
300 dpi
(8.0M, TIFF)

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NEI Website Header Description: Confocal image of rat RPE layer two weeks after laser. A well-defined neovascular membrane labeled with Isolectin Ib4 (red) is detected below proliferating RPE cells (Phalloidin in green). New vessels are growing toward the subretinal space.