Wednesday, July 28, 2021

Common Vision Problems that Hamper Learning

 



August is Children’s Eye Health and Safety Month, and a time to get the kids ready to go back to school. Children need many abilities for scholastic success and good vision is key. During a school day, a child's eyes are constantly in use.

Getting a comprehensive eye exam before going to school will ensure that kids are heading back into the school year and their best overall eye health for learning. A vision screening is not a comprehensive exam. Up to 75% of small vision screenings miss vision problems. Undetected vision problems are attributed to learning disabilities and ADHD. One in four children have vision problems, if left untreated it can affect learning ability and personality. It has never been more important for children to go back to the classroom after nearly a year and a half of remote learning. Kids have dealt with not keeping up and digital eyestrain.

Visual skills every child needs to have for successful learning of the 3Rs and to play school sports. Vision is more than just the ability to see clearly or having 20/20 eyesight. It is also the ability to understand and respond to what they see.

Visual skills every child needs:
  • Visual acuity- the sharpness of vision, measured by the ability to discern letters or numbers at a given distance according to a fixed standard.
  • Eye focusing- Our eyes have an automatic focusing system which adjusts the lens inside our eye in order to see clearly at all distances.
  • Eye tracking-Eye tracking is the process of measuring either the point of gaze (where one is looking) or the motion of an eye relative to the head.
  • Eye teaming- Eye teaming, or binocular vision is a visual efficiency skill that allows both eyes to work together in a precise and coordinated way. Good eye teaming allows sustained, single, and comfortable vision, and is the basis for depth perception.
  • Eye-hand coordination- the way that one's hands and sight work together to be able to do things that require speed and accuracy (such as catching or hitting a ball)
  • Visual perception- Visual perception refers to the brain's ability to make sense of what the eyes see.
        - Recognition
        - Comprehension
        - Retention

Signs a child is having vision problems:
  • Complaints of discomfort and fatigue
  • Frequent eye rubbing & blinking
  • Short attention span or easily distracted
  • Avoiding reading or other close activities
  • Headaches
  • Covering one eye or the other
  • Tilting the head to one side
  • Holding reading material close to the face
  • An eye turning in or out
  • Seeing double
  • Losing their place when reading
  • Difficulty remembering what they have read
  • A child who consistently underperforms
  • Squinting
  • Sitting close to the TV
  • Sensitivity to light
  • Excessive tearing
The most common vision problems in school-age children is blurry vision or refractive errors.
  • Nearsightedness- Nearsightedness (myopia) is a common vision condition in which you can see objects near to you clearly, but objects farther away are blurry.
  • Farsightedness- A vision condition in which nearby objects are blurry. Hyperopia is a common vision condition
  • Astigmatism- A common imperfection in the eye's curvature. With astigmatism, the front surface of the eye or the lens, inside the eye, is curved differently in one direction than the other.
The best way to make sure a child has the visual skills needed to excel in and outside of school is to schedule routine comprehensive eye exams, being proactive with eye health by parents can help correct problems early.

#eyegotcha

#PittsburghEyeCare

#PittsburghOptometrist

Sources:

www.wowvision.net

www.aoa.org

www.allaboutvision.com

www.clevelandclinic.org

Tuesday, July 20, 2021

The Smart Cane

Have you ever noticed a person walking around with a stick out in front of them moving it from left to right and making a tap, tap, tap sound? That person was probably visually impaired, using what is called a “white cane”.  The cane is how a blind individual navigates obstacles in the world. The color of the cane has significance. An all-white can lets others know this person is blind. A white cane with red stripes signifies a user is a blind-deaf person. As a driver, you should yield to a blind pedestrian in or out of a crosswalk. No matter what city, there is no perfectly disabled-friendly city.

The white cane is said to be invented in 1921 by a photographer from Bristol, England, who became blind, after an accident, James Briggs was uncomfortable with the growing amount of traffic with automobiles near his home. He painted his walking stick white to be more visible.

Roll forward to 2017 due to the advancements in technology many products have been re-invented that includes the invention of the smart cane. The WeWalk Smartcane project started in 2017. By 2019 WeWalk was a company. The WeWalk Smartcane was invented by a visually impaired engineer, Kursat Ceylan, who was the CEO and Co-founder of the Young Guru Academy (YGA). Ceylan has known firsthand the challenges of being blind.

Image: www.smithsonianmag.com

The smartcane assists people who are visually impaired by using smart technology. It is equipped with built-in speakers, a voice assistant, Google, and ultra-sonic sensors, which send vibrations to warn of obstacles. WeWalk connects to a smartphone via a proprietary app and Bluetooth. The smartcane will find your current location and navigate to a new location, using clock-based directions. Using geolocation technology if the cane is lost a person can use a voice alert to find it.

Sources:

www.perkins.org

www.boredpanda.com

www.acb.org

www.wewalk.ion

www.cnn.com


#eyegotcha

#PittsburghEyeCare

#PittsburghOptometrist




Tuesday, July 13, 2021

Optical Illusions




Optical illusions are images or pictures that are perceived differently than they are. Optical illusions occur when our eyes send information to the brain that tricks us into perceiving something that does not match reality.

Optical illusions can use color, light, and patterns to create images. These images can be deceptive or misleading to the brain. Creating a perception that in reality does not match the true image. When the brain and the eyes try to communicate in simple language, it gets a little mixed up. The eyes take in information very quickly, but the brain needs to rest, this is what causes the mix-up.

Some optical illusions are physiological. This means that they are caused by some sort of physical means in the eyes for the brain. Optical illusions involve visual deception. Due to the arrangement of images, the effective color, and the impact of a light source. Not everyone experiences visual illusions the same way.

There are four types of optical illusions:
  • Ambiguities- Ambiguous illusions are those objects or pictures that considerably alter in their appearance. More than one figure is there in ambiguous images and therefore it appears differently when looked at from different angles.
  • Distortions- Distorting illusions are characterized by distortions of size, length, or curvature.
  • Paradoxes- Paradox illusions are generated by objects that are paradoxical or impossible in "real life" or three dimensions but look oddly convincing and perplexing in two-dimensional drawings. Such illusions are often dependent on a cognitive misunderstanding that adjacent edges must join.
  • Fictions- Fictions are when a figure is perceived even though it is not in the stimulus like the Kanizsa Triangle.
Optical illusions date back to ancient Greece. The Greeks used optical illusions in their art and architecture. On temples roofs were built at a slant yet observers believed that the rooftops were curved.

Understanding optical illusions became a fascination of many philosophers:
  • In 5 BC, Epicharmus said, “the mind sees and the mind hears, the rest is blind and deaf“.
  • Protagoras believed the opposite, he believed optical illusions were dependent on the environment. Tricking us, not the senses.
  • In 350 BC Aristotle decided both Epicharmus and Protagoras to be correct. Aristotle also believed our senses aren’t that difficult to trick.
  • Plato, deciphering the trickery and ultimately the reality behind illusions is possible with the use of mind and senses.
From ancient Greek philosophers to modern-day psychologists, scientists, researchers, and artists continue to be amazed by this phenomenon we call optical illusions. Optical allusions can be fun and fascinating, but they can also tell us a great deal about the brain and perceptual system functions.


#eyegotcha

#PittsburghEyeCare

#PittsburghOptometrist

#OpticalIllusions

Sources:

www.optics4kids.org

www.wonderopolis.org

www.cleareyes.com

www.history101.com

www.verywellmind.com


Monday, July 5, 2021

Heterochromia

 

Image: www.ptceyecenter.com


July 12th is National Different Colored Eye Day

In ancient Greek heteros meaning different and chroma meaning color so Heterochromia is a different color.

Heterochromia is a difference in coloration of two anatomical structures or two parts of the same structure that are normally alike in color such as eyes. The iris of people with heterochromia is two different colors. Heterochromia is a unique condition where someone has different colored eyes, or their eyes show a mixing of colors.

In most cases, heterochromia is the result of genetics. It is caused by a benign mutation, affecting the way melanin develops in the irises. Only 6 people in 1,000 have this mutation.

There are 3 types of heterochromia

  1. Complete-eyes that are completely different colors.
  2. Segmental-different parts of the iris are different colors.
  3. Central- is when the outer ring of your iris is different colors. 

Heterochromia is usually genetic but can be acquired later in life causes can include:

  • Diabetes
  • Eye surgery
  • Glaucoma
  • Injury to the eye
  • Iris ectropion syndrome
  • Pigment dispersion syndrome
  • Swelling of the eye
  • Tumor of the iris

People who acquire heterochromia or see changes in genetic heterochromia should seek an eye care physician, to rule out other medical conditions. 

 

#DifferentColoredEyeDay

#NationalDifferentColoredEyeDay

#eyegotcha

#PittsburghEyeCare

#PittsburghOptometrist 



Sources:
www.aao.org
www.visionsource.com
www.allaboutvision.com


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