An essay on vision : briefly explaining the fabric of the eye, and the nature of vision: intended for the service of those whose eyes are weak or impaired: enabling them to form an accurate idea of the true state of their sight, the means of preserving it, together with proper rules for ascertaining when spectacles are necessary, and how to choose them without injuring the sight / by George Adams.

  • Adams, George, 1750-1795.
Date:
MDCCLXXXIX [1789]
Catalogue details

Licence: Public Domain Mark

Credit: An essay on vision : briefly explaining the fabric of the eye, and the nature of vision: intended for the service of those whose eyes are weak or impaired: enabling them to form an accurate idea of the true state of their sight, the means of preserving it, together with proper rules for ascertaining when spectacles are necessary, and how to choose them without injuring the sight / by George Adams. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    Or flocks, or herds, or human face divine ; But cloud inftead, and ever-during dark Surrounds me, from the chearful rays of men Cut off, and for the book of knowledge fair, Frefented with an univerfal blank Of nature's works, to me expung'd and raz'd. And wifdom at one entrance quite Ihut out/* A SHORT Description of the Eye. In defcribing the eye, it is natural to confider, iirfl:, the external parts, then the irfternal, or thofe which are more immediately fubfervient to the purpofes of vifion. The eye, as is well known, is fituated below the forehead; it is placed in a bony cavity, called the orbit ; the form is globular, it is com- pofed of feveral coats and humours, and furnifhed with veflels properly adapted to it's various functions. The orbit of the eye is of a conical (hape, but rather irregular in it's dimenfions; it is com- pofed of feven bones, and lined with fat, which forms a foft bed for the eye to reft on, and faci- litates it's various motions. A confidcrable part of the bottom of the orbit is open for the ad- miffioa