Islamic arts are often identified by their abstract compositions based on geometric principles and spiritual concepts. Using artworks from different eras, this paper highlights the presence of a particular model of thought in Islamic arts in which the hierarchy of perspectival vision is abolished. The main argument is based on the ability of some artworks to be looked at from any angle while ma...

islamic arts are often identified by their abstract compositions based on geometric principles and spiritual concepts. using artworks from different eras, this paper highlights the presence of a particular model of thought in islamic arts in which the hierarchy of perspectival vision is abolished. the main argument is based on the ability of some artworks to be looked at from any angle while ma...

PURPOSE Difficulty identifying faces is a common complaint of people with central vision loss. Dakin and Watt (2009) reported that the horizontal components of face images are most informative for face identification in normal vision. In this study, we examined whether people with central vision loss similarly rely primarily on the horizontal components of face images for face identification. ...

in this article, creative and lateral thinking is used to elaborate certain artwork, which can be seen from all sides, but maintain a unified meaning and value. the significance of this subject leads toward research with emphasis on horizontality and with the aim of protecting and publicizing this concept. this is done through decoding the principles and symbols of islamic arts in order to arri...

Ethambutol, a tuberculostatic drug, induces red-green colour vision defects in man and goldfish. The ethambutol-induced red-green colour vision defect in goldfish was argued to originate in the retina because after ethambutol application: (1) inhibitive interactions in red-green (double) opponent ganglion cells are lost [Van Dijk & Spekreijse, 1982 (Investigative Ophthalmology and Visual Scienc...

New work in aphids shows that a nuclear-encoded protein resulting from a horizontal gene transfer is targeted to a bacterial symbiont, further blurring the distinction between organelle and symbiont.

Color information processing in fish and turtles starts with the transformation of the tetra-chromatic cone system into two types of color-opponent horizontal cells (C-type). Few studies reported on large variability between C-type horizontal cells of the same class, suggesting it might improve color vision. However, such variability is contradictory with the tight coupling between horizontal c...

purpose: to evaluate the effect of successful surgical alignment on improvement of binocular vision in adults with childhood strabismus methods: in a prospective interventional study, consecutive patients with childhood-onset, comitant, horizontal and constant strabismus who had successful postoperative alignment were enrolled. preoperative and postoperative binocular vision testing was perform...

PURPOSE To assess the possible effects of retinal prosthesis implant location on the initiation and stability of pursuit eye movements. METHODS Six normally sighted subjects visually tracked a horizontally moving target in natural vision and in simulated prosthetic vision. Subjects were instructed to press a key when the target jumped. Prosthetic vision was simulated with a 10 x 10 array of 1...

Fish Retina Ganglion cell Horizontal streak Vision Abstract The retinal ganglion cell layer of five species of reef teleosts was studied from Nissl-stained whole-mounts and the distribution of neural elements determined quantitatively. Iso-density contour maps of neurons in the ganglion cell layer revealed a temporal area centralis (ranging from 3.5 to 8.3 x 10 cells/mm) which often extended in...