Why Taller People May Be Better At Judging How Far Away Things Are

Tall people are better than short people at gauging how far away they are from objects in the middle distance, a new study reports. The researchers say the results are evidence for the idea that people’s spatial perception abilities are influenced by their height, and develop over time. The human brain depends on a certain model to provide “the best guess of where objects could be located,” said study co-author Teng Leng Ooi, a professor of optometry at The Ohio State University. That model, or “intrinsic bias,” is typically revealed when people have very little information about where an object is located, e.g., literally in the dark, and must make an educated guess. People usually underestimate the distance between themselves and an object, and as objects get farther away, the effect gets larger. “Our previous studies have shown that the intrinsic bias is an imaginary curve that extends from one’s feet and slants upward to the far distance,” Ooi told Live Science in an email. In the new study, 24 people were split into two groups of 12, based on their height. The average height (measured at the eyes) in the groups were 4 feet 11 inches (149.3 cm) and 5 feet 8 inches (173.4 cm). Over three experiments, objects were presented in different levels of light, with different amounts of information to help determine location. The people then guessed the distances to objects by a variety of means, such as pacing out the distance with t...
Source: Healthy Living - The Huffington Post - Category: Consumer Health News Source Type: news

Related Links:

CONCLUSIONS: Evidence from five studies included in this review was inconclusive as to whether cyclodestructive procedures for refractory glaucoma result in better outcomes and fewer complications than other glaucoma treatments, and whether one type of cyclodestructive procedure is better than another. The most commonly reported adverse events across all five studies were hypotony and phthisis bulbi. Large, well-designed randomized controlled trials are needed. Patient-reported outcomes such as pain and quality of life should be considered as primary outcomes or important secondary outcomes of future trials. PMID: 308...
Source: Cochrane Database of Systematic Reviews - Category: General Medicine Authors: Tags: Cochrane Database Syst Rev Source Type: research
Authors: Al-Rashidi SH Abstract Purpose: To review the management outcomes of black diaphragm intraocular (BDI) lens implantation in Arab patients with aniridia. Methods: Patients with aniridia undergone BDI lens implantation at our institution between 2013 and 2014 were included. Uncorrected visual acuity (UCVA), manifest refraction, and best-corrected visual acuity (BCVA) were evaluated before and 6 months and yearly after BDI lens implant surgery until the last visit. Intra- and postoperative complications were noted. Results: Our series comprised 14 patients (8 males) with aniridia. The median duration ...
Source: Journal of Ophthalmic and Vision Research - Category: Opthalmology Tags: J Ophthalmic Vis Res Source Type: research
Objective: The aim of the present study was to observe the feasibility and effect of cornea slice acquired from femtosecond laser surgery, small incision lenticule extraction (SMILE) as patch graft for the prevention of drainage tube exposure and to compare with the sclera. Methods: The research is a prospective comparative randomized study. Patients who received Ahmed glaucoma valve implantation surgery from August 2015 to January 2017 at the Xiamen Eye Center were randomly divided into 2 groups. Group A (corneal group) included 131 cases (135 eyes), receiving the 3 layers of allogeneic cornea slices as graft. Group ...
Source: Medicine - Category: Internal Medicine Tags: Research Article: Clinical Trial/Experimental Study Source Type: research
AbstractAimsTo evaluate the safety and efficacy of vitrectomy combined with an intraoperative dexamethasone (Ozurdex®) implant in refractory diabetic macular edema (DME).MethodsPatients who were diagnosed at our institution as having DME refractory to more than 6  months of non-surgical treatment and underwent intravitreal dexamethasone implantation combined with vitrectomy. All patients were followed up for more than 12 months. Best-corrected visual acuity (BCVA, logMAR), central macular thickness (CMT), and intraocular pressure at the initial visit and 1 , 3, 4, 6, and 12 months after treatment were re...
Source: Acta Diabetologica - Category: Endocrinology Source Type: research
ConclusionsThough dexamethasone does predictably lead to an increase in IOP, this adverse effect was effectively managed with topical treatment. The present study suggests that the intravitreal dexamethasone implant may be considered in patients with DME and a history of steroid-induced ocular hypertension who have exhausted first-line treatments.
Source: Acta Diabetologica - Category: Endocrinology Source Type: research
CONCLUSIONS: Single intravitreal dex-implant did not alter ocular blood flow in the treatment of macular edema due to RVO and diabetes. PMID: 30773934 [PubMed - as supplied by publisher]
Source: Cutaneous and Ocular Toxicology - Category: Toxicology Authors: Tags: Cutan Ocul Toxicol Source Type: research
CONCLUSION: Using Ologen as drug depot for bevacizumab in a trabeculectomy (TE) with MMC is a safe and active surgical method without an increased risk of complications in comparison to pure TE with MMC or TE with MMC and Ologen implant. After 12 months, this treatment exhibited no significant advantages. PMID: 30736077 [PubMed - as supplied by publisher]
Source: Klinische Monatsblatter fur Augenheilkunde - Category: Opthalmology Tags: Klin Monbl Augenheilkd Source Type: research
CONCLUSIONS AND SIGNIFICANCE: Auditory information is a relevant cue when somatosensory and visual inputs are modified and range of vestibular function influence in a dynamic motor activity as gait, facts which must be considered in the neurodevelopment control. PMID: 30729843 [PubMed - as supplied by publisher]
Source: Acta Oto-Laryngologica - Category: ENT & OMF Authors: Tags: Acta Otolaryngol Source Type: research
Abstract OBJECTIVE: To report indications for eye removal, histopathological diagnosis, and surgical trends in enucleation versus evisceration over a 23-year period. DESIGN: Retrospective consecutive case series. PARTICIPANTS: All patients undergoing enucleation or evisceration at the Royal Alexandra Hospital in Edmonton, Canada, between January 1994 and December 2016. METHODS: Demographic information was recorded and archived hospital charts were accessed and reviewed for clinical diagnosis, histopathological diagnosis, and the type of implant used. Univariate and multivariable logistic regression ...
Source: Canadian Journal of Ophthalmology - Category: Opthalmology Authors: Tags: Can J Ophthalmol Source Type: research
Conclusions: Single IVD could significantly decrease macular edema and improve visual outcome for eyes with persistent long-term macular edema after macular ERM removal and the effect can be sustained as long as 6 months after the initial injection. However, in order to maintain the visual and anatomical outcome, repeat IVD might be considered if macular edema recurs. PMID: 30693103 [PubMed]
Source: Journal of Ophthalmology - Category: Opthalmology Tags: J Ophthalmol Source Type: research
More News: Brain | Child Development | Children | Eye Implants | Eyes | Men | Neurology | Opthalmology | Psychology | Science | Study | Washington University | Websites | Women