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Modern Digital technology and its role in Cinematography using available light [PDF]

open access: yesMaǧallaẗ Al-Turāṯ wa Al-Taṣmīm, 2022
the use of available light (it is any natural or artificial light or a mixture of them) is an artistic phenomenon where all types of available light can be used dramatically and adapted by the director of photography so that he can convey the dramatic ...
Maged Mahmoud   +2 more
doaj   +1 more source

Grey Filter Contact Lens as Therapeutic Option for Acquired Reduced Binocular Visual Performance

open access: yesBritish and Irish Orthoptic Journal, 2021
Disturbing binocular problems can be too complex to be treated in such a way that comfortable binocular single vision is restored. The grey filter contact lens could offer a safe and clinically useful way to help these patients. Background: In unilateral
Hans van Vliet   +5 more
doaj   +1 more source

Ray Tracing versus Thin-Lens Formulas for IOL Power Calculation Using Swept-Source Optical Coherence Tomography Biometry

open access: yesJournal of Ophthalmic & Vision Research, 2022
Purpose: To evaluate the ray tracing method's accuracy employing Okulix ray tracing software and thin-lens formulas to calculate intraocular lens (IOL) power using a swept-source optical coherence tomography (SS-OCT) biometer (OA2000).
Reza Ghaffari   +5 more
doaj   +1 more source

Three‐dimensional single‐shell dielectric lens design using complex coordinates and local axis‐displaced confocal quadrics

open access: yesIET Microwaves, Antennas & Propagation, 2023
This study proposes an analytical formulation in complex coordinates to synthesise three‐dimensional single‐shell dielectric lens surfaces. An exact formulation based on geometrical optics is developed, and the synthesis problem is modelled as a non ...
Aline Rocha deAssis   +2 more
doaj   +1 more source

Negative Index Metamaterial Lens for Subwavelength Microwave Detection

open access: yesSensors, 2021
Metamaterials are engineered periodic structures designed to have unique properties not encountered in naturally occurring materials. One such unusual property of metamaterials is the ability to exhibit negative refractive index over a prescribed range ...
Srijan Datta   +6 more
doaj   +1 more source

Trifocal Intraocular Lens Implantation to Treat Visual Demands in Mongolian Patients

open access: yesCentral Asian Journal of Medical Sciences, 2022
Objective: Intraocular lens (IOL) implants are artificial lenses which helps to clear up the vision after cataract surgery. In this work, we aimed to compare the monofocal and trifocal IOL implantation during phacoemulsification.
Narangarav Gunchin-Ish   +2 more
doaj   +1 more source

The Long-Term Effect of Blue-Light Blocking Spectacle Lenses on Adults’ Contrast Perception

open access: yesFrontiers in Neuroscience, 2022
PurposeTo evaluate the long-term effect of two different degrees of blue-light blocking (BB) spectacle lenses on adults’ contrast perception under various lighting conditions.MethodsIn total, 144 healthy adults aged 24.70 (±4.32 years) were recruited to ...
Yan Lian   +5 more
doaj   +1 more source

The impact of different lenses on visual and musculoskeletal complaints in VDU workers with work-related neck complaints : a randomized controlled trial [PDF]

open access: yes, 2017
Objectives: The impact of wearing lenses on visual and musculoskeletal complaints in VDU workers is currently unknown. The goal of this study was 1) to evaluate the impact of wearing VDU lenses on visual fatigue and self-reported neck pain and disability,
Cagnie, Barbara   +5 more
core   +1 more source

Effects of Different Contact Lens Designs on Visual Quality Among the Soft Spherical Contact Lens Users

open access: yesTürk Oftalmoloji Dergisi, 2013
Purpose: To evaluate the effects of different lens designs on visual quality among soft spherical contact lens users. Material and Method: Forty eyes of twenty patients from our contact lens unit were included in this study.
Mustafa Demir   +2 more
doaj   +1 more source

Is There a Quad Problem among Optical Gravitational Lenses? [PDF]

open access: yes, 2007
Most of optical gravitational lenses recently discovered in the Sloan Digital Sky Survey Quasar Lens Search (SQLS) have two-images rather than four-images, in marked contrast to radio lenses for which the fraction of four-image lenses (quad fraction) is ...
Oguri, Masamune
core   +2 more sources

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