#visual acuity

[stone-cold-groove]

Can we always believe our own eyes?

#vintage illustration #optical illusions #games #vintage magazines #eye tests #visual acuity #perception

[bpod-bpod]

Clear to See

We often pick out patterns in everyday life, but patterns are also integral to our sight too. Our retinas: light-sensing region at the back of our eye, need to develop following the right pattern. This involves defining a high acuity area (HAA); responsible for our ability to see small details, in the region of the retina closest to the temple. Without it, our clarity of vision can be impaired. HAAs are common in many diurnal (active in the day) organisms, including humans and zebrafish. Researchers studying the retina in developing zebrafish embryos have discovered that the foxd1 gene supports HAA formation. Normally defined by a higher density of light-sensing cells that are longer in length, HAAs in embryos without foxd1 (pictured) lose that density, and the cells are shorter (right-hand side; green and magenta), decreasing the resolution of sight. This video shows layers of the eye stacked on top of each other, moving from back to the front.

Written by Sophie Arthur

Video by María Hernández-Bejarano and colleagues

Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Madrid, Spain and Department of Cell and Developmental Biology, University College London, London, UK

Video originally published with a Creative Commons Attribution 4.0 International (CC BY 4.0)

Published in Development, December 2022

You can also follow BPoD on Instagram, Twitter and Facebook

#science #biomedicine #zebrafish #immunofluorescence #retina #vision #eyesight #sight #fovea centralis #visual acuity #developmental biology #embryo development

[mcatmemoranda]

To use the Snellen chart, stand 20 feet away and read the rows of letters, starting at the top and working your way to the bottom. Do this while covering one eye and reading the chart with your uncovered eye. When you finish with one eye, restart the test with your other eye uncovered.

Each row of the Snellen chart represents a level of visual acuity, which is based on two numbers. The first number describes the Snellen chart’s distance from the patient. In the U.S., this number will almost always be 20 to represent 20 feet of distance. Countries that use the metric system will normally use the number 6 to represent a distance of 6 meters.

The second number describes how clearly a person can read a line of the Snellen chart from 20 feet away. For example, if someone has 20/20 vision, or “normal” vision, it means they can clearly read a line from 20 feet away that the average person could.

If someone has 20/50 vision, it means they have to be 20 feet away to read a line from the chart that someone with “normal” vision could read from 50 feet away. Source

The denominator being a larger number means worse vision. The denominator being a smaller number means better vision.

#Snellen #Snellen chart #vision #vision screen #visual acuity

[averwonders]

you know you're down bad for academic validation and perfect scores when you don't see a 6/6 VA in your eye test report and your first thought is "oh no I've gotta do better than that, this is disappointing, I've let my family down :'( why didn't I get a better score."

#it's hilarious when i saw the visual acuity 6/12 with my current glasses and i felt bad for not having 6/6 #lmao #needed new glasses haha #eye tests #glasses #visual acuity #aver does shit post #to add onto my disappointment my unaided va is 6/36 #i am a shame to my lineage *dramatic bgm* *dramatic sobbing* #i am laughing at my own nonsense dramatics

[rptv-starwars]

Stormtrooper eye exam

#star wars #stormtrooper #eye examination #eye chart #visual acuity

[drforambhuta]

Eye Health Evaluation within Comprehensive Health Checkups: Assessing ocular health is vital within comprehensive health evaluations. While optometrists and ophthalmologists conduct primary ocular examinations, additional tests are integrated into full body checkups to provide a complete assessment of eye health. These supplementary tests include:

• Visual Acuity Assessment: Healthcare professionals evaluate visual acuity using standardized eye charts to identify any central or peripheral vision impairments.

• Intraocular Pressure Monitoring: Tonometry is used to measure intraocular pressure, crucial for screening glaucoma and initiating timely interventions to prevent vision loss.

• Ocular Surface Examination: Evaluating tear film stability, corneal health, and tear osmolarity aids in diagnosing and managing dry eye disease.

• Fundoscopic Evaluation: Direct or indirect ophthalmoscopy enables visualization of internal eye structures to detect conditions like diabetic retinopathy and macular degeneration.

• Optical Coherence Tomography (OCT): This imaging technique provides detailed images of the retina and optic nerve, aiding in the detection and monitoring of retinal pathologies.

• Visual Field Testing: Automated perimetry assesses visual field integrity, essential for diagnosing and managing glaucoma and optic neuropathies.

• Corneal Topography and Biometry: These tests characterize corneal curvature and dimensions, crucial for evaluating candidates for refractive surgery.

• Pupillary Assessment: Evaluating pupillary reflexes helps identify neurological disorders such as cranial nerve palsies.

• Color Vision Testing: Assessing color perception aids in diagnosing retinal pathologies and congenital color vision deficiencies.

• Refraction and Prescription: Optometrists conduct refraction assessments to determine the appropriate refractive correction for optimal visual performance.

These tests collectively provide a comprehensive evaluation of ocular health within a regular full body health checkup. You can choose to undergo regular health checkups from some of the best hospitals in India offering health checkup packages.

#full body health checkup #health checkup packages #regular health checkups #eye health #ocular health #visual acuity #tonometry #intraocular pressure #eye disease #fundoscopy #diabetic retinopathy #optical coherence tomography #OCT #glaucoma #corneal topography #refraction #color vision testing

[devinemeditech]

Digital Acuity Chart

Using a Devine Meditech distance vision testing device, people can test their vision while seated either directly facing the drum (direct option) or indirectly facing the mirror (indirect option). Additionally, the interior surface of the drum is typically striped, so while the drum rotates, the subject's eyes are exposed to a moving visual field while they stay motionless.

It has frontal, on-surface display, special image-based display for patients who cannot read, easy-to-use, hand-held controls, compact, lightweight design, and colour deficiency test.

LCD Auto Chart System

The LCD Auto Chart System includes a wireless handset. Computerized or digital eye charts are being used more and more in the assessment of visual acuity. For every instrument, there are selectable optotypes, presentation modalities, and crowding options. People test their vision with the Devine Meditech LCD Auto Chart equipment while positioned with their backs to the drum wall. For vision tests, a digital vision chart is helpful. It's easy to use with the handy remote control, which has keys designated for each chart.

Features

Compact and light weight

Multiple Regional languages

Exclusive Image gallery for various eye diseases

Reverse mode available for all charts

Compensation for red green filter

Suitable for all refraction rooms

Easy Wall mounting

Cordless remote work from any direction

Chart offered : C/E Chart, Dot Chart ,Snellen , Ishihara Chart, Astigmatic fan, Log mar Chart, Spot Light, Duochrome test light

Phoropter

A device consisting of prisms, lenses, and cylinders called the AA Phoropter measures the refractive error of the eye to help determine an appropriate prescription. With a Phoropter, one can measure the eye's natural resting position, binocular vision, near-distance focal ability, and eye movements.

Features

•   Lens switching with high speed and low noise •   Operation interface with easy-to-operate layout •   Two-in-one operation mode of tablet and keyboard •   App supports the use of Android tablets and iPad •   Equipped with split prism •   Bluetooth wireless connection with tablets and other devices

Automated Chart Projector

Automated Chart Projector with IR Controller, Screen and Wall Mount Uses of Automated Chart Projector

With its remote controller, quick toggling of icons, red/green & polarized icon test sheet, binocular vision, and binocular balance, it can generate more accurate measurement results in less time.

Features of automated chart projector –

LED light source, lower heat and longer life

 Advanced electrical control system, charts switching does not flicker

Noiseless motor, charts switch mute and without vibration

Excellent red and green balance function

Using dial wheel to focus, convenient and fast

220-230 voltage power supply

Conclusion

The vision tester emerges as a pivotal tool in safeguarding and enhancing visual acuity. By providing a systematic and accurate assessment of one's eyesight, this device plays a crucial role in early detection of potential eye disorders, contributing to timely interventions and preventive measures. The convenience and efficiency of vision testers make them an invaluable asset in various settings, from healthcare facilities to educational institutions. The vision tester is a testament to the convergence of technology and healthcare because it enables people to take proactive steps toward maintaining their vision, ultimately promoting a world where everyone can access visual wellness.

#eye #visual acuity #acuitychart #eyetest

[knowledgevariabledarcy]

#visual art #visual archive #visual asmr #visual acuity #visual appeal #Youtube

[heintzmagic]

#Visual acuity

[gobble12]

Understanding Visual Acuity: The Essence of Clear Vision

An in-depth look at visual acuity, its significance in daily life, factors influencing it, and the importance of maintaining optimal vision.

#visual acuity

[scienceswitch]

What Animal Has the Best Eyesight? Exploring the Incredible Diversity of Animal Eyes

Animal eyes come in astounding varieties, each uniquely evolved for a creature’s visual needs. But which animal has the outright best eyesight? There’s no simple answer, as different species excel in various categories. Let’s dive deeper into some top contenders in key vision areas. For low-light vision, the colossal squid stands above the rest with its dinner plate-sized eyes. These massive…

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#Animal Adaptations #Animal Eyes #Animal Visual Systems #Best Eyesight #Color Vision #Low-Light Vision #Optical Wonders #Vision Prowess #Visual Acuity #Visual Adaptations

[allperfectpets]

Can Fish See in the Dark? The Surprising Answer

Fish have long spellbound our creative minds with their submerged world, and inquiries regarding their tactile capacities frequently emerge. One fascinating viewpoint is their vision, especially their capacity to find in low-light circumstances. In this article, we will dig into the entrancing domain of fish vision and investigate whether fish can genuinely find in obscurity.

#fish vision #dark perception #underwater adaptation #low-light environments #fish eyes #aquatic life #nocturnal creatures #visual acuity #light sensitivity #marine biology #natural adaptations #sensory systems #darkness exploration #night vision #fish behavior #ocular anatomy #aquatic vision #light conditions #vision in dim light #visual perception #photoreceptor cells #retinal adaptations #twilight vision #mysterious abilities #visual adaptation #sensory adaptations #underwater perception #deep-sea exploration #fish anatomy #light and darkness

[themontessoriacademyofarlington]

Infant - Visual Acuity

For non-mobile infants, various mobiles are hung above them depending on their developmental needs. Once they start reaching and using their hands for grasping, mobiles are a great way to encourage the refinement of their hand and fine motor skills. This student lays on the rug to allow for freedom of movement and natural gross motor development. This particular mobile is a wooden chime that makes noise as he moves it, reinforcing the concept of cause and effect while fostering auditory awareness. He also enjoyed tracking it with eyes as it moves in the wind, improving his visual acuity.

#visual acuity #freedom of movement #fine motor skills #gross motor development #cause and effect #auditory awareness #tma #private school #arlingtontx #arlington #texas #infant #nido #toddler #early childhood #preschool #kindergarten #elementary #education #private education #nontraditional #the montessori academy of arlington

[bluelocksource]

Itoshi Sae’s trivia (source: twt & Egoist Bible).

"I'll see with my own eyes what kind of FW (idiot) will be born in Japan."

☆ Character's colour: Adzuki bean color (reddish-brown).

☆ Nickname: ‘Japan’s Treasure’.

☆ Birthday: 10th October.

☆ Current age: 18 (3rd year of high school)

☆ Zodiac: Libra.

☆ Birthplace: Kamakura City, Kanagawa Prefecture.

☆ Family: Mother. Father. Himself. Younger brother.

☆ Current height: 180 cm.

☆ Foot size: 26.5 cm

☆ Dominant foot: Left foot.

☆ Blood type: A.

☆ Starts playing football: At age 1. “Before I knew it, I was playing soccer.”

☆ Team before returning to Japan: レ・アール下* Youth FC.

☆ Favorite food/drink: Salted kelp tea (shio-kombucha). “Because I can go back to 0.” (meaning he feels refreshed after drinking it)

☆ Disliked food: French fries. “It’s deadly delicious but it’s deadly to my health.”

☆ Favorite animal: Seagulls. “I like migratory birds that doesn’t stay in one place.”

☆ Favorite season: At the end of summer. "It seems that the world is starting to get lonesome."

☆ Favorite football player: Álvaro Recoba. “The left footer that casts a rainbow (perfect curve) on the pitch.” (Sae was referring to Alvaro quotes: “If today's game is on a rainy pitch, I'll draw a rainbow with my left foot.”. Álvaro is known for his curling-free-kick.)

☆ Favorite music: ‘Mercury’ by tofubeats ft. Seira Kariya. “I listen to this to cool down.”

☆ Favorite manga: Gegege no Kitaro.

☆ Favorite movie: Taxi Driver. “This De Niro is the coolest.”

☆ Favorite TV show: Chibi Maruko-chan. “It reminds me of home.”

☆ Favorite brand: “All of my sponsors. They know they're not crazy for betting on me, they have good eyes.”

☆ Hobby: Analysing data of football players and teams. “It’s easier to see the numbers in visualized data.”

☆ Mushroom shoots vs Bamboo shoots: “Depends on the mood.”

☆ What goes best with rice : Salted kelp (shio-kombu). “They don’t have it in Brazil, so I asked my parents back home to send some here.”

☆ What makes him happy: “A play beyond my imagination.”

☆ What makes him upset: Being forced to carry Japanese soccer on his back. “I’m talking about you guys.”

☆ What he thinks his strength is: He has flat ways looking at things. (meaning he look at things objectively) "People often calls me dry**, but who cares?"

☆ What he thinks his weakness is: The fact that he doesn’t know anything else other than soccer. “You guys shouldn’t live this way.”

☆ Favorite/Best subject: “I don’t know since I’ve only focus on soccer and didn’t pay attention in classes.”

☆ What made him cry recently: “Like I'd tell you, idiot.”

☆ Usual sleeping time: 8 hours (7 hours sleeping + 1 hour nap)

☆ Place he washes first when taking a bath: His bangs’ hairline.

☆ Fixation: Buttocks. “You’ll know an athlete's ability by the shape of their buttocks.”

☆ Number of chocolates received from previous Valentine: Around 2000. “That’s what my manager told me.”

☆ The first time he got confessed to: “I don’t remember which one was the first, octopus.” (here, octopus is just an insult like 'idiot' or 'fool', etc.)

☆ What will he do if received 100 million yen: “I’m not interested in such small amount of money.”

☆ At what age he stops receiving presents from Santa: At age 10.

☆ What was his last wish from Santa: “My own talent that I haven’t yet seen.”

☆ How he spent his holiday: Gazing at the sea.

☆ What will he do during his last day on Earth: Give the world's best striker the world's best pass.

*Not sure about the exact pronounciation but the most of the translation says 'Les Halles'.

** In Japan, there are terms called ‘dry person’ & ‘wet person’. ‘Dry person’ is someone who can think rationally without being overwhelmed by emotions and because of their calm demeanor, they are thought to be cold and unapproachable. ‘Wet person’ is the opposite of ‘dry person’.

note: i want to apologize in advance for any mistake made in the translation!

#blue lock #itoshi sae #trivia: itoshi sae #trivia: profile #bluelocksource #trivia #to those who reblog before changes made i'm really sorry #there was no info on his 'visual acuity' #he doesn't have bad eyeseight #really sorry about that #admin han #our translation

[snails-in-spaceships]

Inumaki with more snake-like attributes >>>

#his technique gives him the snake eyes and fangs markings #give him actual fangs!! make him cold easily!! bad peripheral vision but good visual acuity!! #inumaki toge #jjk #chatty snails

[dailypokemoncrochet]

Level 2 Silhouette

Who's that Pokemon?

#silwhoette pokemon #so the levels for the this and the next two are based on what me and my friend ranked as difficulty #but idk this could be super hard and the next one super easy #depending on your own individual guessing skills. pokemon knowledge. visual acuity? #anyway hope yall have fun with these :D