Vision

90% Of Marijuana Users Think It Doesn't Bring Visual Impairment, But They're Wrong

Some people believe that marijuana can be medical but almost no marijuana users think it impairs their vision. Though over 90 percent of users believe that cannabis has no effect on their vision, or perhaps a slight effect, smoking cannabis significantly a ...

Article - News Staff - Apr 13 2021 - 1:15pm

Dyslexia Affects Visual Processing Beyond Just Reading

Dyslexia is well-known to impact reading ability but it has been unclear which brain processes are affected by the condition. Whether dyslexia is, at its core, a visual processing disorder is hotly debated among researchers. With reading and writing a key ...

Article - News Staff - Nov 15 2021 - 3:33pm

Gene Mutations In Retinal Lesions From Vitelliform Macular Dystrophy Found

Multimodal adaptive optics imaging has revealed photoreceptor and retinal pigment epithelium relationships in eyes with vitelliform macular dystrophy.  Vitelliform macular dystrophy (VMD) is an inherited genetic disease that causes progressive vision loss ...

Article - News Staff - Jul 28 2022 - 9:19am

Young Incidence Of Type 2 Diabetes Puts Vision At Risk

Sixteen-year-old Karl is seen for the first time in my optometry practice. He was referred to me for a fluctuating vision problem. During his examination, I saw signs suggesting he may have diabetes, which could have explained the fluctuating vision. This ...

Article - The Conversation - Feb 7 2023 - 6:31am

Digital Content May Be Shaping Visual Perception Itself

To adult audiences in 1977, "Star Wars" was the most realistic special effects they had ever witnessed while to younger people of today, the defects are obvious. Some of that is due to better technology, a cheap TV has better clarity and resoluti ...

Article - News Staff - Feb 23 2023 - 11:03am

Laughter Exercise Could Be Treatment For Dry Eye Disease

Dry eye disease is a chronic condition estimated to affect around 360 million people. Common symptoms include uncomfortable, red, scratchy or irritated eyes. Anecdotal claims are that laughter therapy alleviates depression, anxiety, stress, and chronic pai ...

Article - News Staff - Sep 12 2024 - 11:41am

Eye Evolution Gets Its 'War And Peace'

One of the biggest difficulties in understanding and acceptance of evolutionary biology is the eye.  It isn't just detractors who are trying to protect a sectarian viewpoint, it is genuinely curious people, smart people, who don't get it because ...

Article - Hank Campbell - Aug 25 2025 - 7:06pm

None Of Us See The Same Colors But Our Brains See Some Things In Common

Colors trigger unique brain responses, the subjective nature of our brains and eyes, not to mention different media, is why a famous blue dress experiment took countries by storm. To try and help determine how different people have the same brain responses ...

Article - News Staff - Sep 9 2025 - 9:34am

Object-Based Processing: Numbers Confuse How We Perceive Spaces

Researchers recently studied the relationship between numerical information in our vision, and how it affects our perception of space- and discovered subtle asymmetries that color our view on the world. They wanted to see if numbers in our vision create “a ...

Article - News Staff - Dec 29 2025 - 4:30am

Bias Is Why Super Mario Runs Left To Right

Why did the earliest side-scrolling games go left to right? From the 1980s on, they seemed to do that. And in the western world people write left to right. That is enough for psychologist Dr. Peter Walker of Lancaster University to speculate that there may ...

Article - News Staff - Dec 29 2025 - 9:11am