Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Contact Angle01:13

Contact Angle

19.3K
When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces.
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
19.3K
Contact-dependent Signaling01:19

Contact-dependent Signaling

47.0K
Contact-dependent signaling, as the name suggests, requires that communicating cells be in direct contact with each other. This is achieved either through receptor-ligand interactions or by specialized cytoplasmic channels that allow the flow of small molecules between cells. In animal cells, channels called gap junctions facilitate contact-dependent signaling in certain tissues, whereas, plasmodesmata perform a similar function in plants.
Gap Junctions
In animal cells, gap junctions are formed...
47.0K
Transmission-based Precautions I: Contact, Enteric, and Droplets01:17

Transmission-based Precautions I: Contact, Enteric, and Droplets

4.6K
Transmission-based precautions are for patients known to be infected or suspected to be infected or colonized with organisms that pose a significant risk to others. Some transmission-based precautions include contact, enteric, and droplet.
Contact Precautions:
Contact precautions are the measures taken to prevent the transmission of infectious agents, especially epidemiologically important microorganisms such as MRSA or influenza, primarily transmitted through direct or indirect contact with an...
4.6K
Lattice Centering and Coordination Number02:33

Lattice Centering and Coordination Number

11.5K
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
11.5K
Responses to Gravity and Touch02:26

Responses to Gravity and Touch

41.9K
Gravitropism: Plant Responses to Gravity
41.9K
Improving Translational Accuracy02:07

Improving Translational Accuracy

14.9K
Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...
14.9K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

In Vitro Repeatability and Inter-Device Agreement of Higher-Order Aberration Measurements in Scleral Lenses Using Two Hartmann-Shack Metrology Devices.

Sensors (Basel, Switzerland)·2026
Same author

Physiological chromatic model eyes for IOL characterization.

Biomedical optics express·2026
Same author

Evaluating retinal image quality for myopia control lenses in a synthetic accommodative wavefront model.

Biomedical optics express·2026
Same author

Limitations of OTF-based metrics for predicting through-focus visual acuity in pseudophakic eyes.

Biomedical optics express·2025
Same author

Fast and Slow Response of the Accommodation System in Young and Incipient-Presbyope Adults During Sustained Reading Task.

Journal of clinical medicine·2025
Same author

Design concepts for advanced-technology intraocular lenses [Invited].

Biomedical optics express·2025

Related Experiment Video

Updated: Jan 31, 2026

Multifocal Electroretinograms
16:49

Multifocal Electroretinograms

Published on: December 4, 2011

18.9K

Multifocal contact lenses: towards customisation?

Miguel Faria-Ribeiro1, José M González-Méijome1

  • 1Clinical & Experimental Optometry Research Lab (CEORLab), Centre of Physics, University of Minho, Braga, Portugal.

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
|January 11, 2019
PubMed
Summary

Contact lenses with power profiles for average eyes underperform in eyes with significant spherical aberration (SA). Customizing bifocal contact lens (CL) power can improve visual performance in these individuals.

Keywords:
bifocal contact lensesmultifocalpupil diameterspherical aberration

More Related Videos

Development of an In Vitro Ocular Platform to Test Contact Lenses
08:28

Development of an In Vitro Ocular Platform to Test Contact Lenses

Published on: April 6, 2016

11.2K
Scanning Light Scattering Profiler SLPS Based Methodology to Quantitatively Evaluate Forward and Backward Light Scattering from Intraocular Lenses
06:55

Scanning Light Scattering Profiler SLPS Based Methodology to Quantitatively Evaluate Forward and Backward Light Scattering from Intraocular Lenses

Published on: June 6, 2017

8.0K

Related Experiment Videos

Last Updated: Jan 31, 2026

Multifocal Electroretinograms
16:49

Multifocal Electroretinograms

Published on: December 4, 2011

18.9K
Development of an In Vitro Ocular Platform to Test Contact Lenses
08:28

Development of an In Vitro Ocular Platform to Test Contact Lenses

Published on: April 6, 2016

11.2K
Scanning Light Scattering Profiler SLPS Based Methodology to Quantitatively Evaluate Forward and Backward Light Scattering from Intraocular Lenses
06:55

Scanning Light Scattering Profiler SLPS Based Methodology to Quantitatively Evaluate Forward and Backward Light Scattering from Intraocular Lenses

Published on: June 6, 2017

8.0K

Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Spherical aberration (SA) is a common ocular aberration that can affect visual quality.
  • Simultaneous-imaging contact lenses (CLs) are designed to provide clear vision at multiple distances.
  • Standard CLs are often designed for an 'average eye,' potentially leading to suboptimal performance in eyes with unique aberration profiles.

Purpose of the Study:

  • To evaluate the performance of simultaneous-imaging CLs with average-eye power profiles in eyes with significant SA.
  • To determine if customizing CL power can enhance visual quality in eyes with non-average SA levels.

Main Methods:

  • A statistical model generated 100 synthetic eyes with varying Zernike fourth-order SA coefficients.
  • Four bifocal CL power profiles (center-near/distance, two-zone/four-zone) were modeled using computational wave-optics.
  • Maximal multifocal efficiency (MFE), a metric synthesizing through-focus visual performance, was calculated for each eye-CL combination.

Main Results:

  • CLs with average-eye profiles showed reduced MFE in eyes with non-average SA.
  • Adjusting CL power (distance and add power) partially mitigated MFE reduction due to SA.
  • The four-zone center-near (CN) bifocal CL design demonstrated better tolerance to varying SA levels compared to two-zone designs.

Conclusions:

  • Eyes with significant SA underperform with standard, average-eye CLs.
  • Semi-customizing bifocal CL power profiles can improve visual performance at distance and near for individuals with non-average SA.