From steam engines, to contact lenses, to biometric security based on someone's voice, there are a lot of inventions out there that are older than you think.<b<br/>r/>

Hosted by: Hank Green (he/him)

You've seen those viral videos of colorblind people putting on special glasses and reacting to colors they've never seen before! Today, we'll explore how colorblindness works and what those glasses try to do to fix it! Hosted by: Hank Green

The Polaris Dawn crew Jared Isaacman, Scott "Kidd" Poteet, Sarah Gillis and Anna Menon explain the experiments conducted during the mission. Also, see a time-lapse of Isaacman's spacewalk.



Credit: Polaris Dawn / edited by...

The team teams up with experts to discover why onions make us cry and to test various methods to prevent tears. With insights from an ophthalmologist and a botanist, they explore the science behind the eye irritation caused by onions....

Corneal Abrasion (“Scratched Eye”) | Causes, Signs & Symptoms, Diagnosis, Treatment



A corneal abrasion is a disruption (abrasion, scrape, or scratch) of the cornea, the transparent front layer of the eye. This can occur by a...

Did you know how old these items were? Tell us which one shocked you most in the comments below! Here's 10 Modern Items that are WAY Older Than You Think

Bacterial Keratitis (Eye Infection From Contact Lenses) | Causes, Pathophysiology, Symptoms, Diagnosis, Treatment



Bacterial Keratitis is a serious eye condition that is caused by a bacterial infection and subsequent...

7 Risks of Contact Lens Use | Eye Infections, Disease and Complications from Contact Lenses



Contact lenses are used for a variety of eye conditions, including myopia, anisometropia, and for cosmetic purposes among other...

At the Consumer Electronics Show, CES 14, Innovega gave the National Science Foundation a demo of their contact lens, glasses technology that allows users to view things far in the distance and right in front of their...

Scientists created the first telescopic contact lens that allows users to zoom in their vision almost three times. The telescopic contact lens has two regions. The centre allows light to pass straight through, which provides normal...

Ever felt your eyes turn as coarse as sandpaper after 4 pm because of your ordinary contact lenses? If that sounds familiar, you're not alone. Say goodbye to contact lens discomfort with AirOptix lenses!“Don't compromise on comfort while...

The number of children with myopia or nearsightedness is growing dramatically worldwide, and new research shows the biggest contributing factor is spending too much time indoors.

Contact Lens

Contact lens consultation

Contact Lens Removal

inserting Contact Lens

Contact lens macro

Side view of contact lense into eye

B/W 1936 doctor giving woman eye exam to fit her for contact lenses / newsreel

video close up of woman inserting Contact Lens (HD)

Video close up of woman inserting Contact Lens (HD)

Extreme Close Up push-in - Eye drops reveal parasites on an eye with a contact lens in a computer-generated animation.

contact lens applied to eye

HD: Woman Preparing To Insert Contact Lens