Results 31 to 40 of about 6,627,792 (217)

Ishihara

, 2005
This article traces the development of this well-known test for colour deficient vision, first published in 1917 by the Japanese ophthalmologist, Dr Shinobu Ishihara, and still in use ...
Kindel, Eric
core   +8 more sources

Triggerfish uses chromaticity and lightness for object segregation [PDF]

Royal Society Open Science, 2017
Humans group components of visual patterns according to their colour, and perceive colours separately from shape. This property of human visual perception is the basis behind the Ishihara test for colour deficiency, where an observer is asked to detect a
Laurie Mitchell, Karen L. Cheney, Fabio Cortesi, N. Justin Marshall, Misha Vorobyev   +4 more
doaj   +1 more source

Comparison on testability of visual acuity, stereo acuity and colour vision tests between children with learning disabilities and children without learning disabilities in government primary schools

Indian Journal of Ophthalmology, 2014
Context: Children with learning disabilities might have difficulties to communicate effectively and give reliable responses as required in various visual function testing procedures.
Nurul Farhana Abu Bakar, Ai-Hong Chen
doaj   +1 more source

Wearable Improved Vision System for Color Vision Deficiency Correction

IEEE Journal of Translational Engineering in Health and Medicine, 2017
Color vision deficiency (CVD) is an extremely frequent vision impairment that compromises the ability to recognize colors. In order to improve color vision in a subject with CVD, we designed and developed a wearable improved vision system based on an ...
Paolo Melillo, Daniel Riccio, Luigi Di Perna, Gabriella Sanniti Di Baja, Maurizio De Nino, Settimio Rossi, Francesco Testa, Francesca Simonelli, Maria Frucci   +8 more
doaj   +1 more source

The incidence of visual subclinical manifestations in multiple sclerosis [PDF]

Romanian Journal of Neurology, 2013
Optic neuritis is often the initial manifestation in multiple sclerosis (15%). There is a significant percent of patients affected by clinically definite multiple sclerosis that report no ocular symptoms.
Monica Grecescu
doaj   +1 more source

Ishihara charts versus tritan blue test in diagnosis of optic neuropathy

Journal of the Egyptian Ophthalmological Society
Background There are various causes of optic neuropathy (ON). Accurate diagnosis of ON based on clinical history, examination, and investigations. ON generally leads to decreased visual acuity, altered color perception, and visual field (VF) defects in ...
Mahmoud D.A. Ahmed, Sheriff S. Elwan, Ashraf A. Shaat, Yasmine M.M. Shaaban   +3 more
doaj   +1 more source

Effect of Formal Training on Tooth Shade Matching Ability among Indian Dental Students in Diverse Clinical Settings: A Quasi-experimental Study [PDF]

Journal of Clinical and Diagnostic Research
Introduction: Selecting a correct shade is the key to success of any prosthesis, especially in the aesthetic zone. Variations of shade in a single tooth or the polychromatic nature of a tooth can impose greater challenges in shade matching. Therefore, it
Akanksha Mahajan, Neha Jain, Pankaj Dhawan   +2 more
doaj   +1 more source

Validation of a New Digital and Automated Color Perception Test

Diagnostics
Although color vision deficiencies are very prevalent, there are no ideal methods for assessing color vision in all environments. We compared a new digital and automated method that quantifies color perception for the three protan, deutan, and tritan ...
Alvaro Fanlo-Zarazaga, José Ignacio Echevarría, Juan Pinilla, Adrián Alejandre, Teresa Pérez-Roche, Diego Gutiérrez, Marta Ortín, Victoria Pueyo   +7 more
doaj   +1 more source

A Novel Smartphone-Based Color Test for Detection of Color Vision Defects in Age Related Macular Degeneration

Journal of Ophthalmology, 2022
Purpose. To evaluate the efficacy of the smartphone-based K-color test to detect color defects in patients with Age-related Macular Degeneration (AMD). Methods.
Vassilios Karampatakis, Diamantis Almaliotis, Leonidas Karamitopoulos, George Kalliris, Stavroula Almpanidou   +4 more
doaj   +1 more source

Brightness contrast as source of error in the ishihara test for colour blindness

Indian Journal of Ophthalmology, 1965
Joshi Vasant
doaj   +3 more sources