Category: Eye Tests

Z Health Hand-Eye Coordination Chart: What It Is and How It Improves Visual Performance

Person holding a hand-eye coordination training chart at arm’s length while looking at it to practice smooth eye tracking.

The Z-Health hand eye coordination chart is a vision training tool that uses smooth pursuit eye movements across a grid of letters and numbers to improve how your eyes track moving targets and coordinate with physical movement. Developed as part of the Z-Health Performance Solutions system, this chart trains your visual system through structured tracking exercises that challenge both your eye muscles and the neural pathways connecting vision to motor control.
Unlike static vision charts you might encounter at a routine eye exam, this tool requires active movement. You hold the…

Test Your Vision with 3 Different Eye Charts

What is an eye chart?
Used by eye doctors to measure the vision of a patient and compare it to the chart. The different types of eye charts include the Snellen eye chart, the tumbling E eye chart, and the Jaeger eye chart.
The Snellen eye chart
It was developed by Herman Snellen. It is a classic example containing 11 rows of capital letters which get smaller. When a patient is getting an eye exam, they are asked to find the smallest line of letters they can read and read it out loud. Your visual acuity is excellent if you can read letters at the bottom row.
“Tumbling E” eye chart
This test is a …

What to Expect in an Astigmatism Test

An astigmatism test is done during an all-inclusive eye exam by your doctor. Astigmatism symptoms include headaches, eye strain, and distorted vision.
To check for astigmatism, the tests below are performed:

Refraction: In an eye exam, there are two types of refraction. They are manual and automated refraction.
Visual Acuity Test: An eye chart is used to test your visual acuity with or without your current lenses. It determines how severe your astigmatism is.
Keratometry: It involves measuring your cornea curvature to perceive unequal curves in various meridians of the cornea. A Keratometer instrument …