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 |
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An Essay on Vision, Briefly Explaining the Fabric of the Eye and the Nature ... George Adams Volledige weergave - 1792 |
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alſo apparatus appear becauſe become beſt better brought called caſe cauſe clear colour common concave confuſed conſiderable conſidered contract convex cornea covered cryſtalline cure dark defect determine direction diſtance diſtinct diſtinct viſion diſtinctly Ditto double drawing effect electrical enable equally experiments fall fight figure firſt fixed frames give glaſs glaſſes greater hand hence human humour imperfect inches Inſtruments it's kind lens leſs look manner means membrane mind moſt motion mounted moving muſt natural nearer neceſſary nerve object obſerved occaſion optic organ perceive perfect perſon picture plate produced proper pupil purpoſe quantity rays of light reaſon receives refracted removed render retina ſame ſee ſeen ſeveral ſhould ſide ſight ſingle ſmall ſome ſpectacles ſquint ſtate ſuch teleſcope theſe thoſe turned uſe various viſible viſion whoſe