摘要:

The reaction‐time to a series of successive digits was measured on two subjects. After practice, it was found that whilst the reaction time to the onset of the series was constant at 150 ms, the response time to additional digits became less and less to asymptote to a level of about 50 ms. The time course of this ‘chorus‐line’ phenomenon was studied in greater temporal detail by varying the interval in steps of 20 ms. The effect was greatest at 200 ms. Thereafter, it declined and for long intervals reached the value of a standard reaction time. On a third inexperienced subject, the learning period was established; this was about 300–400 presentations. The implications of these findings are discussed against the background of everyday visual motor

ISSN:0275-5408    

DOI:10.1111/j.1475-1313.1988.tb01084.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

ISSN:0275-5408    

DOI:10.1111/j.1475-1313.1988.tb01085.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

A simple computer program for calculating schematic and reduced eyes is presented. The user supplies distances from the front of the eye and radii of curvature of refractive surfaces (anterior and posterior cornea and lens), distance to retina, and refractive indices of ocular media (cornea, aqueous, lens, vitreous). These values are input to calculate the necessary parameters for construction of a schematic and reduced eye, using Gaussian formula and assuming a homogenous lens. The program produces powers of optical components and of the whole eye, cardinal points of the eye, and estimates of refractive state and retinal image size. These values may be printed in tabular form or plotted to scale with a graphics plotter. The program simplifies construction of schematic eyes by allowing rapid recalculation of the eye after changing one or more input parameters.

ISSN:0275-5408    

DOI:10.1111/j.1475-1313.1988.tb01086.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

ISSN:0275-5408    

DOI:10.1111/j.1475-1313.1988.tb01088.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

The Applied Vision Association was founded in 1977 to provide a forum for the discussion of problems in the applied aspects of vision. It is sponsored and supported by the British College of Optometrists, although its international membership includes representatives from a wide variety of disciplines and institutions. Further information on the Association and its annual programme of meetings and visits can be obtained from: AVA Secretariat, British College of Optometrists, 10 Knaresborough Place, London SW5 OTG, UK.

ISSN:0275-5408    

DOI:10.1111/j.1475-1313.1988.tb01089.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

The Society, which is open to all, aims to aid the exchange of ideas in the field of Optometry. The 1988 meeting will be held on 25–26 July. Details can be obtained from the Secretary of the Society: Dr N. Hirji, The James Gracie Conference Centre, 36–38 Wake Green Road, Moseley, Birmingham B13 9PE,

ISSN:0275-5408    

DOI:10.1111/j.1475-1313.1988.tb01090.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

摘要:

Book reviewed in this article:A Practical Guide to Cataract and Lens Implant Surgery: R. S. BartholomewNeuro‐ophthalmology: Clinical Signs and Symptoms: Thomas J. WulshVision and Aging: General and Clinical Perspectives: Edited by A. A. Rosenbloom and M. W MorganA Textbook of Clinical Ophthalmology: R. Pitts Crick and R. B. Trimb

ISSN:0275-5408    

DOI:10.1111/j.1475-1313.1988.tb01091.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

ISSN:0275-5408    

DOI:10.1111/j.1475-1313.1988.tb01092.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

ISSN:0275-5408    

DOI:10.1111/j.1475-1313.1988.tb01093.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY

ISSN:0275-5408    

DOI:10.1111/j.1475-1313.1988.tb01094.x

出版商:Blackwell Publishing Ltd    

年代:1988

数据来源: WILEY