Now Viewing: eye_chart

Tag type: General

An eye chart is a test used to measure a person's visual acuity. Common in Japan is the Landolt C test, where the chart contains circles with small gaps and the subject has to determine on which side the gap lies.

Visual acuity is measured by two numbers, where the first number is the distance the subject needs to read something and the second number is the distance a normal person needs. In America, it is standard for the first number to be 20 (feet), with 20/20 being normal vision. In Japan and countries that use the metric system, the standard is 6 (meters), with normal vision being 6/6.

h4.See also

* Landolt C
* occluder



Other Wiki Information

Warning: Undefined variable $webmLink in /home/bbooru/public_html/includes/wiki/wiki_view.php on line 88
alt=" :o absurdres ahoge animal_ears arknights blue_eyes commentary covering_one_eye eye_chart female green_hair hand_up highres holding horse_ears horse_girl jacket landolt_c long_sleeves looking_at_viewer multicolored_hair occluder open_clothes open_jacket parted_lips proviso_(arknights) shirt short_hair simple_background solo speech_bubble toyyot two-sided_fabric two-sided_jacket two-tone_hair upper_body v-shaped_eyebrows white_background white_hair white_jacket white_shirt " border="0" title=" :o absurdres ahoge animal_ears arknights blue_eyes commentary covering_one_eye eye_chart female green_hair hand_up highres holding horse_ears horse_girl jacket landolt_c long_sleeves looking_at_viewer multicolored_hair occluder open_clothes open_jacket parted_lips proviso_(arknights) shirt short_hair simple_background solo speech_bubble toyyot two-sided_fabric two-sided_jacket two-tone_hair upper_body v-shaped_eyebrows white_background white_hair white_jacket white_shirt score: rating:questionable" class="preview"/> Warning: Undefined variable $webmLink in /home/bbooru/public_html/includes/wiki/wiki_view.php on line 88
alt=" black_bra bra bra_visible_through_clothes breasts brown_hair commentary_request eye_chart female highres ishizaka_ryuudai lab_coat lace lace_bra large_breasts leaning_forward looking_at_viewer occluder open_mouth original partially_unbuttoned pointer pov purple_eyes underwear " border="0" title=" black_bra bra bra_visible_through_clothes breasts brown_hair commentary_request eye_chart female highres ishizaka_ryuudai lab_coat lace lace_bra large_breasts leaning_forward looking_at_viewer occluder open_mouth original partially_unbuttoned pointer pov purple_eyes underwear score: rating:safe" class="preview"/> Warning: Undefined variable $webmLink in /home/bbooru/public_html/includes/wiki/wiki_view.php on line 88
alt=" 1boy 1girls aged_up bent_over black_hair breasts closed_eyes dark-skinned_male dark_skin doctor doctors_office doggy_style duo eye_chart female human indoors interracial julius_hibbert lisa_simpson lockandlewd male male/female nipples nude nude_female nude_male open_mouth sex stethoscope straight straight_sex text text_bubble the_simpsons yellow_skin " border="0" title=" 1boy 1girls aged_up bent_over black_hair breasts closed_eyes dark-skinned_male dark_skin doctor doctors_office doggy_style duo eye_chart female human indoors interracial julius_hibbert lisa_simpson lockandlewd male male/female nipples nude nude_female nude_male open_mouth sex stethoscope straight straight_sex text text_bubble the_simpsons yellow_skin score: rating:explicit" class="preview"/> Warning: Undefined variable $webmLink in /home/bbooru/public_html/includes/wiki/wiki_view.php on line 88
alt=" 2girls akemi_homura bad_feet barefoot black_hair blue_eyes blush book braid breasts censored commentary_request convenient_censoring eye_chart first_aid_kit glasses hair_ribbon headband infirmary kaname_madoka landolt_c long_hair looking_at_viewer mahou_shoujo_madoka_magica mahou_shoujo_madoka_magica_(anime) multiple_girls nasunoko nude on_bed pink_eyes pink_hair purple_eyes red-framed_eyewear ribbon semi-rimless_eyewear short_hair short_twintails sidelocks sitting small_breasts smile twin_braids twintails under-rim_eyewear very_long_hair wariza yuri " border="0" title=" 2girls akemi_homura bad_feet barefoot black_hair blue_eyes blush book braid breasts censored commentary_request convenient_censoring eye_chart first_aid_kit glasses hair_ribbon headband infirmary kaname_madoka landolt_c long_hair looking_at_viewer mahou_shoujo_madoka_magica mahou_shoujo_madoka_magica_(anime) multiple_girls nasunoko nude on_bed pink_eyes pink_hair purple_eyes red-framed_eyewear ribbon semi-rimless_eyewear short_hair short_twintails sidelocks sitting small_breasts smile twin_braids twintails under-rim_eyewear very_long_hair wariza yuri score: rating:explicit" class="preview"/> Warning: Undefined variable $webmLink in /home/bbooru/public_html/includes/wiki/wiki_view.php on line 88
alt=" 6+girls a_summer_day's_dream animal_ears bed black_hair blonde_hair book bottle box broom bunny_ears camera chair clock closed_eyes desk dreamcast eating everyone eye_chart female from_above from_behind gap ghost grey_hair hakurei_reimu hat hitodama houraisan_kaguya ibuki_suika inaba_tewi isometric izayoi_sakuya japanese_clothes kimono kirisame_marisa konpaku_youmu long_hair looking_at_viewer maid maid_headdress maid_uniform maikaze microphone minigirl multiple_girls oni patchouli_knowledge poster pov pov_eye_contact purple_hair rails reading red_eyes reisen_udongein_inaba remilia_scarlet ribbon saigyouji_yuyuko sega_dreamcast shameimaru_aya shoes short_hair sitting skirt skirt_lift sleeping standing tail tea television tengu tokine_(maikaze) touhou wall_scroll window wings yagokoro_eirin yakumo_yukari yawn yawning " border="0" title=" 6+girls a_summer_day's_dream animal_ears bed black_hair blonde_hair book bottle box broom bunny_ears camera chair clock closed_eyes desk dreamcast eating everyone eye_chart female from_above from_behind gap ghost grey_hair hakurei_reimu hat hitodama houraisan_kaguya ibuki_suika inaba_tewi isometric izayoi_sakuya japanese_clothes kimono kirisame_marisa konpaku_youmu long_hair looking_at_viewer maid maid_headdress maid_uniform maikaze microphone minigirl multiple_girls oni patchouli_knowledge poster pov pov_eye_contact purple_hair rails reading red_eyes reisen_udongein_inaba remilia_scarlet ribbon saigyouji_yuyuko sega_dreamcast shameimaru_aya shoes short_hair sitting skirt skirt_lift sleeping standing tail tea television tengu tokine_(maikaze) touhou wall_scroll window wings yagokoro_eirin yakumo_yukari yawn yawning score: rating:safe" class="preview"/> Warning: Undefined variable $webmLink in /home/bbooru/public_html/includes/wiki/wiki_view.php on line 88
alt=" &gt;_&lt; 5girls adjusting_eyewear aoki_reika bespectacled blue-framed_eyewear bow candy_(smile_precure!) closed_eyes clothes_around_waist commentary_request copyright_name eye_chart eyelashes glasses green-framed_eyewear hair_ornament hairpin heart heart-shaped_eyewear highres hino_akane_(smile_precure!) hoshizora_miyuki landolt_c loafers mahkn midorikawa_nao multiple_girls nanairogaoka_middle_school_uniform necktie one_eye_closed pink-framed_eyewear pink_bow precure red-framed_eyewear school_uniform semi-rimless_eyewear shoes sleeves_rolled_up smile_precure socks standing sweater sweater_around_waist under-rim_eyewear yayoi_kise yellow-framed_eyewear " border="0" title=" >_< 5girls adjusting_eyewear aoki_reika bespectacled blue-framed_eyewear bow candy_(smile_precure!) closed_eyes clothes_around_waist commentary_request copyright_name eye_chart eyelashes glasses green-framed_eyewear hair_ornament hairpin heart heart-shaped_eyewear highres hino_akane_(smile_precure!) hoshizora_miyuki landolt_c loafers mahkn midorikawa_nao multiple_girls nanairogaoka_middle_school_uniform necktie one_eye_closed pink-framed_eyewear pink_bow precure red-framed_eyewear school_uniform semi-rimless_eyewear shoes sleeves_rolled_up smile_precure socks standing sweater sweater_around_waist under-rim_eyewear yayoi_kise yellow-framed_eyewear score: rating:safe" class="preview"/>

View more »