The accommodation of na\u00efve adults frequently drops dramatically when occluded, especially if the task does not demand detailed vision<\/li>\n<\/ul>\nPurpose<\/h2>\n
A remote haploscopic photorefractor, designed for assessment of accommodation and convergence in infants and clinical groups, was used to determine heterophoria accommodative convergence\/accommodation (AC\/A) ratios in normal naive adults. These were compared with conventional clinical measures.<\/p>\n
Methods<\/h2>\n
Twenty-one naive subjects were used to compare occluded and unoccluded prism cover test responses with the remote haploscopic photorefractor using a text and picture target.<\/p>\n
Results<\/h2>\n
Although luminance was generally low for both targets, binocular vergences were appropriate for target demand in both studies. Binocular accommodation showed greater lag for the highest target accommodative demand and the less demanding target. Occlusion not only reduced vergence response, but also frequently caused a marked reduction in accommodation, especially to the picture target. Normal mean AC\/A values were found, but with wide variations between individual subjects.<\/p>\n
Conclusions<\/h2>\n
Although mean accommodation, vergence, and AC\/A values were comparable with published data, we suggest that in these conditions using naive subjects, accommodation is frequently inaccurate, especially on occlusion, without concomitant loss of vergence, at least at low light levels. Accommodative convergence may play a less important part in, and other cues contribute more to, the near reflex than has been previously suggested.<\/p>\n","protected":false},"excerpt":{"rendered":"
Horwood AM, Turner JE, Houston SE, Riddell PM.. Optometry & Visual Science 2001, 78, 791-804 View paper Accommodation is better when binocular The accommodation of na\u00efve adults frequently drops dramatically…Read More ><\/a><\/p>\n","protected":false},"author":8,"featured_media":0,"parent":75,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"__cvm_playback_settings":[],"__cvm_video_id":"","footnotes":"","_links_to":"","_links_to_target":""},"class_list":["post-168","page","type-page","status-publish","hentry"],"acf":[],"aioseo_notices":[],"yoast_head":"\nVariations in Accommodation and Convergence Responses in a Naturalistic Setting - Focus on Children\u2019s Vision<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/research.reading.ac.uk\/childrens-vision\/ophthalmologists-orthoptists-optometrists\/variations-accommodation-convergence-responses-naturalistic-setting\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Variations in Accommodation and Convergence Responses in a Naturalistic Setting - Focus on Children\u2019s Vision\" \/>\n<meta property=\"og:description\" content=\"Horwood AM, Turner JE, Houston SE, Riddell PM.. 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