Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Focusing of Light in the Eye

Focusing of Light in the Eye

Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...

$Influence of Earth's Curvature and Atmospheric Refraction on Leveling$ 01:26

Influence of Earth's Curvature and Atmospheric Refraction on Leveling

During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance. Over a...

Angle Closure Glaucoma: Treatment

Angle Closure Glaucoma: Treatment

Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...

You might also read

Related Articles

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

Sort by

Same author

A cost-aperture study of a family of lenses.

Applied optics·2010

Same author

Design and use of mass-produced aspheres at Kodak.

Applied optics·1985

See all related articles

Search research articles

Related Experiment Video

Updated: Jun 16, 2026

Correction of Presbyopia by Monocular Bi-Aspheric Ablation Profile

Published on: September 20, 2024

Refractive null correctors for aspheric surfaces.

|February 20, 2010

Summary

Designing aspheric surfaces for optical testing requires careful consideration of refractive null correctors. This study guides the design of both the asphere and the null corrector for optimal nullability and accurate optical testing.

Area of Science:

Optical Engineering
Metrology
Aspheric Optics

Background:

Refractive null correctors are essential for testing aspheric surfaces.
The accuracy of testing is limited by the wavefront match between the corrector and the asphere.
Designing aspheres and correctors for nullability is critical.

Purpose of the Study:

To provide guidance on designing aspheric surfaces to ensure their nullability.
To present design principles for refractive null correctors.
To offer a compendium of functional and constructional null corrector designs.

Main Methods:

Analysis of wavefront aberrations in refractive null correctors.
Development of design strategies for aspheric surfaces to facilitate null testing.

More Related Videos

$Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter$

Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter

Published on: September 16, 2025

Related Experiment Videos

Last Updated: Jun 16, 2026

Correction of Presbyopia by Monocular Bi-Aspheric Ablation Profile

Published on: September 20, 2024

$Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter$

Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter

Published on: September 16, 2025

Compilation and categorization of existing null corrector designs.

Main Results:

Established criteria for designing aspheres that are amenable to null testing.
Presented methodologies for optimizing refractive null corrector designs.
Cataloged a range of functional and constructional null corrector designs.

Conclusions:

Effective design of both aspheres and null correctors is paramount for accurate optical testing.
The presented guidance facilitates the development of null-testable aspheric optics.
The compendium serves as a resource for selecting appropriate null corrector designs.