The puzzle Shared on X (formerly Twitter) by the account Brainy Quiz, this visual riddle invites users to count the total number of squares in a geometric image.

In today’s optical illusion challenge, a hidden “A” cleverly disguises itself among rows of “404.” This tricky eye test has stumped many, with only 1% spotting it instantly. The visual puzzle tests ...

Single leg squat (SLS) is a common tool used in clinical examination to set and evaluate rehabilitation goals, but also to assess lower extremity function in active people.Objectives To conduct a ...

Can you spot the hidden cat in a bowl of popcorn? Test your visual skills with this fun optical illusion.

Memory tests evoke a second stage of internal attentional deployment following both expected and unexpected memory tests, extending attentional re-orienting to working memory.

Need new glasses? Online eye exams and vision tests offer a convenient way to get a glasses prescription. Doctors explain whether these services are worth trying.

A visual personality test reveals the type of person you are at your core based on the specific image you chose.

See details about Quest Diagnostics's self-order lab testing, at-home diagnostic tests, and its app.

Various at-home tests can check levels of vitamins and minerals in a blood or saliva sample. Here, we learn about the best tests to order online.

Although best corrected visual acuity was the only visual function test ready for immediate use in a diabetic retinal disease staging system, others showed promise or potential, according to a ...

Switching from paper to online standardized tests caused significant drops in students’ scores—and vulnerable students were hurt the worst.