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Refraction and how to refract : including sections on optics, retinoscopy, the fitting of spectacles and eyeglasses, etc. / by James Thorrington.

Refraction of the human eye and methods of estimating the refraction : including a section on the fitting of spectacles and eye-glasses / by James Thorington.

Retinoscopy (or shadow test) in the determination of refraction at one meter distance, with the plane mirror / by James Thorington.

Retinoscopy : (or shadow test) in the determination of refraction at one meter distance, with the plane mirror / by James Thorington.

Retinoscopy (or shadow test) in the determination of refractions at one meter distance, with the plane mirror / by James Thorington.

Retinoscopy (or shadow test) in the determination of refraction at one meter of distance, with the plane mirror / by James Thorington.

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Refraction and how to refract : including sections on optics, retinoscopy, the fitting of spectacles and eyeglasses, etc. / by James Thorrington.

Refraction of the human eye and methods of estimating the refraction : including a section on the fitting of spectacles and eye-glasses / by James Thorington.

Retinoscopy (or shadow test) in the determination of refraction at one meter distance, with the plane mirror / by James Thorington.

Retinoscopy : (or shadow test) in the determination of refraction at one meter distance, with the plane mirror / by James Thorington.

Retinoscopy (or shadow test) in the determination of refractions at one meter distance, with the plane mirror / by James Thorington.

Retinoscopy (or shadow test) in the determination of refraction at one meter of distance, with the plane mirror / by James Thorington.

Wellcome uses cookies.

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Active filters:

Refraction and how to refract : including sections on optics, retinoscopy, the fitting of spectacles and eyeglasses, etc. / by James Thorrington.

Refraction of the human eye and methods of estimating the refraction : including a section on the fitting of spectacles and eye-glasses / by James Thorington.

Retinoscopy (or shadow test) in the determination of refraction at one meter distance, with the plane mirror / by James Thorington.

Retinoscopy : (or shadow test) in the determination of refraction at one meter distance, with the plane mirror / by James Thorington.

Retinoscopy (or shadow test) in the determination of refractions at one meter distance, with the plane mirror / by James Thorington.

Retinoscopy (or shadow test) in the determination of refraction at one meter of distance, with the plane mirror / by James Thorington.