Abstract
A subjective guessing bias has been claimed to be present in association with visual acuity testing using the classic circular Landolt ring. A semiautomated visual test system has been described previously which uses an angular version of the broken ring. Evidence is presented here which indicates that this version of the test object overcomes the problem of guessing bias and thus might prove to be not only a preferred "standard" or reference optotype but also an acceptable clinical optotype in its own right.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: American journal of optometry and physiological optics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
