Assessing Distance Vision

Assessing distance vision requires understanding what a patient CAN see, what they WANT to see, and determining the right magnification level to meet their needs. This page contains our process and tools for finding the right low vision device for a particular patient's vision goals.

Tech Optics' Process for Addressing Distance Vision Challenges

STEP 1

What CAN Your Patient See?

Using the Tech Optics Printable Distance Chart, you can assess a patient's distance visual acuity. The chart is calibrated for a distance of five (5) feet.

Place the chart on a well-lit wall and stand 60 inches away.

With their glasses on, the lowest line on which the patient can read 3 out of the 5 letters is the patient's distance visual acuity.

Download Tech Optics Printable Distance Chart

STEP 2

What Does Your Patient WANT to See?

Determining goal acuity for distance can be a bit of a challenge. A patient's description of their challenges might not translate to an eye chart. They might say something like "I have trouble seeing faces."

Here's a list of some common tasks and their target acuities.

TasksAcuity Required
Seeing Street Signs20/30 - 20/40
Reading Captions on TV20/20 - 20/50
Seeing Detail of Faces20/20
Improved Recognition of People20/100

STEP 3

Calculating Distance Magnification

To use the calculator below, first input the measured acuity (what the patient can see). Then input the goal acuity (what the patient wants to see). The result will indicate what magnification level is appropriate for the patient's goal.

STEP 4

Find the Right Device

In magnification, more is not better. You're making a trade. When you increase magnification, you reduce field of view. You want the minimum amount of magnification required to achieve the patient's goals so you can maximize their field of view.

2.8X SPORTGLASSES LOUPE
2.8X SPORTGLASSES LOUPE
Tech Optics Sport Glasses 2.8x - Binoculars
$30.00
3.5X SPORTGLASSES NEAR LOUPE
3.5X SPORTGLASSES NEAR LOUPE
Tech Optics Sport Glasses 3.5x - Binocular
$49.95
Tech Optics Monocular Telescope 6x16
Tech Optics Monocular Telescope 6x16
Tech Optics Monocular Telescope 6x16
Tech Optics Monocular Telescope 6x16
$42.95
2.5X SPORTGLASSES LOUPE
2.5X SPORTGLASSES LOUPE
Tech Optics Sport Glasses 2.5x - Binocular
$30.00
Tech Optics Telescopes - Custom Mounted
Tech Optics Telescopes - Custom Mounted
Tech Optics Telescopes - Custom Mounted
Tech Optics Telescopes - Custom Mounted
$149.00
Tech Optics Monocular Telescope 3x20
Tech Optics Monocular Telescope 3x20
Tech Optics Monocular Telescope 3x20
Tech Optics Monocular Telescope 3x20
$42.95
Tech Optics Monocular Telescope 10x25
Tech Optics Monocular Telescope 10x25
Tech Optics Monocular Telescope 10x25
Tech Optics Monocular Telescope 10x25
$42.95
Tech Optics Monocular Telescope 8x21
Tech Optics Monocular Telescope 8x21
Tech Optics Monocular Telescope 8x21
Tech Optics Monocular Telescope 8x21
$42.95
Tech Optics Monocular Telescope 4x12
Tech Optics Monocular Telescope 4x12
Tech Optics Monocular Telescope 4x12
$42.95