Disease relevance of Depth Perception

• The authors determined whether stereopsis can be demonstrated in children treated for congenital cataract after compensating for their amblyopia and strabismus [1].
• In three cases the superior oblique contracted vividly after administration of succinylcholine despite the presence of excyclotropia, stereopsis, torticollis (two cases) and a hypertropia that increased in adduction, in down-gaze, in adduction and down-gaze and on ipsilateral head-tilt [2].
• No significant differences were found between ICSI children and controls with regard to hyperopia, myopia, astigmatism, heterotropia, stereoscopic vision and convergence [3].
• We confirmed the stereopsis in Duane's syndrome and checked the motion perception (MP) by using the Reversing Grating Test to investigate if the congenital motor abnormality affects the MP in patients whose binocular sensory system is well developed [4].
• METHODS: A retrospective chart review of patients with albinism was used to segregate those with a letter visual acuity of 20/100 or better in one eye, assessment of stereopsis, and strabismus < or = 10 PD [5].

Psychiatry related information on Depth Perception

• RESULTS: In children with infantile strabismus, the critical period for susceptibility of stereopsis begins at 2.4 months and peaks at 4.3 months [6].
• Midline fusion, a recurrent theme when describing callosal function, was assessed using tasks which included depth perception with binocular and/or monocular cues, two-point discrimination thresholds and sound localization in the peri-central and lateral fields [7].
• 3. Both drugs affected colour discrimination, and dimenhydrinate degraded night-vision, reaction-time, and stereopsis [8].
• In spite of dose dependence and grave subjective and significant objective psychopathology, no significant impairment of binocular depth perception was found with (S)-ketamine [9].
• CONCLUSION: Although the stereo viewing system promises improved depth perception and the TFT and image projection displays are supposed to improve hand-eye coordination, none of these systems provided better task performance than the standard viewing system in this pelvi-trainer experiment [10].

High impact information on Depth Perception

• Binocular depth perception following REM deprivation or awake state visual deprivation [11].
• A moving cast shadow of the object affects the perception of the object's trajectory in adults [Kersten, D., Mamassian, P., & Knill, D. C. (1997). Moving cast shadow induce apparent motion in depth. Perception, 26, 171-192] [12].
• Monocular and binocular visual depth perception was tested in 33 patients with WBS [13].
• We suggest that interocular feature matching can attenuate the potency of interocular suppression, but unlike in previous work (McKee, S. P., Bravo, M. J., Taylor, D. G., & Legge, G. E. (1994) Stereo matching precedes dichoptic masking. Vision Research, 34, 1047) we do not invoke a special role for depth perception [14].
• On the other hand, the temporo-occipital junction (i.e. human MT (middle temporal area) / MST (medial superior temporal area) complex) was activated in dynamic stereopsis [15].

Chemical compound and disease context of Depth Perception

• Perception of Glass pattern structure with stereopsis [16].
• Impaired growth in retinal layers leading to delay in maturation of electroretinogram and depth-perception in postnatal rats occur due to pyridoxine deficiency [17].
• A significant impairment of binocular depth perception was found when nabilone was administered, but combined application with cannabidiol revealed somewhat reduced effects on binocular depth inversion [18].
• Viewing fluorescein angiograms with stereopsis significantly assists interpretation [19].
• Performance on tasks which required depth perception was significantly poorer when subjects wore prism glasses with 8 and 12 delta BI and BO, whereas 4 delta BI and BO did not significantly affect performance [20].

Biological context of Depth Perception

• Distance stereopsis was assessed with the Mentor Binocular Vision Testing System (B-VAT) system for 45 patients with ocular deviations of 6 delta or more at distance (heterophoria and intermittent strabismus) and for 36 patients with orthophoria [21].
• This implies that the anisotropies reflect the spatiotemporal properties and distribution of binocular disparity detectors in the human cortex and result in a tilted surface that pivots around the horizontal midline in the space of binocular depth perception [22].
• Visual acuity was measured using the NVG Resolution Grid and stereopsis was determined using a modified Howard-Dolman test [23].
• The effects of q.i.d. administration of 60 mg pseudoephedrine (Sudafed) tablets or pseudoephedrine-triprolidine (Actifed) tablets after 5 d of medication were measured on tests of night vision, color perception, stereopsis, and reaction time [24].

Anatomical context of Depth Perception

• These findings suggest that in MS impairment of depth perception, which is encoded in the primary visual cortex (area 17) and visual association cortex (areas 18 and 19), may be improved by administration of AC pulsed EMFs of picotesla flux density [25].

Gene context of Depth Perception

• The minimum and maximum disparities for stimulating static and dynamic stereopsis in strabismus were examined as a function of spatial separation of disparate stimuli [26].
• Sequential stereopsis produced good performance throughout in terms of low disparity thresholds when head position was varied by rotations around three axes: vertical (azimuth condition); horizontal (elevation); and midline (tilt) [27].
• Quantitative modeling of the result implied a weak role for magnocellular input, suggests that human stereopsis is more strongly influenced by parvocellular input through the LGN [28].
• Stereoscopic depth perception is possible when the short wave sensitive (SWS or "Blue") cones are isolated using a yellow adapting field [29].
• We describe a modified version of the Frisby Stereopsis Screening Test which enables a light to be flashed behind the stereo target when the child being tested makes an appropriate pointing or reaching response [30].

Analytical, diagnostic and therapeutic context of Depth Perception

• A similar pattern was present in the control group except for myopia and stereopsis [31].
• A retrospective study of 100 cases with suppression of one fovea was carried out to discover the relationship between the residual angle of strabismus (if present), the quality of stereopsis and fusional amplitudes [32].

References