A rationale of the laws of cerebral vision1830 |
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adverted Anthony Carlisle appear asserted axis Bishop Berkeley Brain British Association called centre Cerebral Vision circle coach Color Images consequence consideration corresponding course of pressures cranial eyes crossed distance employed evidence existence experiments external direction external object fact farther Fearn field of vision Figure Fourth Mode half interlaced inverted JOHN FEARN judgment labors left eye Librating matter Mode of Vision nature nerves never Newton nose observe occasion optic nerves Optical Science Peacock's Feather Percipience pheno phenomena philosophical pin's head Pneumatological posterior Potterfield present Professor Stewart proof Proposition pupil question Rationale rays of light reader reason recrossed vision regard Reid Reideian remark result retina retinal image retinal impressions right eye seen images Sensations of Colors Sensorial Sensorium Sentient sight single eye Sir David Brewster Sir Isaac Newton steers supposed tactual visual image thing tion Touch truth whole word word COACH Writers
Popular passages
Page 44 - Is not the Sensory of Animals that place to which the sensitive Substance is present, and into which the sensible Species of Things are carried through the Nerves and Brain, that there they may be perceived by their immediate presence to that Substance?
Page 7 - ... does it not appear from Phaenomena that there is a Being incorporeal, living, intelligent, omnipresent, who in infinite Space, as it were in his Sensory, sees the things themselves intimately, and thoroughly perceives them, and comprehends them wholly by their immediate presence to himself; Of which things the Images only carried through the Organs of Sense into our little Sensoriums, are there seen and beheld by that which in us perceives and thinks.
Page 158 - ... these Colours arise from such Motions excited in the bottom of the Eye by the Pressure and Motion of the Finger, as, at other times are excited there by Light for causing Vision? And do not the Motions once excited continue about a Second of Time before they cease? And when a Man by a stroke upon his Eye sees a flash of Light, are not the like Motions excited in the Retina by the stroke?
Page 7 - When a Man in the dark presses either corner of his Eye with his Finger, and turns his Eye away from his Finger, he will see a Circle of Colours like those in the Feather of a Peacock's Tail.
Page 11 - Apparitions are likewise considered by him as nothing more than ideas, or the recollected images of the mind, which have been rendered more vivid than actual impressions.
Page 7 - And these things being rightly dispatch'd, does it not appear from Phaenomena that there is a Being incorporeal, living, intelligent, omnipresent, who in infinite Space, as it were in his Sensory, sees the things themselves intimately, and thoroughly perceives them, and comprehends them wholly by their immediate presence to himself...
Page 11 - I propose to go much farther, and to show that the ' mind's eye' is actually the body's eye, and that the retina is the common tablet on which both classes of impressions are painted, and by means of which they receive their visual existence according to the same optical laws. Nor is this true merely in the case of spectral illusions ; it holds good of all ideas recalled by the memory, or created by the imagination, and may be regarded as a fundamental law in the science of pneumatology.
Page 51 - It is now about fifteen months since a similar affection occurred again to myself, without my being able to assign any cause whatever, or to connect it with any previous or subsequent indisposition. The blindness was first observed, as before, in looking at the face of a person I met, whose left eye was to my sight obliterated. My blindness was in this instance the reverse of the former, being to my right (instead of the left) of the spot to which my eyes were directed ; so that I have no reason...
Page 12 - For the rays to speak properly are not coloured. In them there is nothing else than a certain power and disposition to stir up a sensation of this or that colour.
Page 11 - ... are more vivid than the pictures in the body's eye. This principle has been placed by Dr. Hibbert beyond the reach of doubt ; but I propose to go much farther, and to show that the