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EyeOnVision September, 2022

September Issue, 2022 – Pediatric Vision


Portable acuity screening for any school: validation of patched HOTV with amblyopic patients and Bangerter normals

Tsao Wu M, Armitage MD, Trujillo C, Trujillo A, Arnold LE, Tsao Wu L, Arnold RW. Portable acuity screening for any school: validation of patched HOTV with amblyopic patients and Bangerter normals. BMC Ophthalmol. 2017 Dec 4;17(1):232. doi: 10.1186/s12886-017-0624-y. PMID: 29202721; PMCID: PMC5716052.

Background: There was a need to validate and calibrate portable acuity screening tools so amblyopia could be detected quickly and effectively at school entry.

Methods: Spiral-bound flip cards and download pdf surround HOTV acuity test box with critical lines were combined with a matching card. Amblyopic patients performed critical line, then threshold acuity which was then compared to patched E-ETDRS acuity. 5 normal subjects wore Bangerter foil goggles to simulate blur for comparative validation.


Adapting the state-of-the-art principles for acuity testing, ABCD suggested a modification of Wendy Marsh-Tootle’s Surround HOTV 10-foot test card. The ABCD HOTV card presents 4 optotypes down to 20/16 range whereas Dr. Tootle’s stopped at 20/20. The matching card has surrounded letters to avoid confusion, has a “spectacle-delineated” pinhole enhancement and an HOTV near card that resembles Paul Runge’s near system but is adapted to just 10-inches found to be more approximate a child’s lap-reading distance. The 10-foot distance and 10-inch near are quickly demarcated by detachable strings. Age-appropriate screening cut-offs (20/40 for K and below, 20/32 for older than K) are quickly located by offset tabs. This chart has been used with objective screening in the Anchorage School District extensively.


McCormick Place, Chicago
Friday, Sept. 30 – Monday, Oct. 3

Stop By Booth 2911

  • Chat with our specialists and pick up a complimentary Conversion Card. Quickly convert contrast values, ICD-9 and ICD-10 vision loss reporting values, as well as world-wide notations with this handy pocket card.


Q:  What is Normal Vision?
“Normal” visual acuity for healthy eyes is one or two lines better than 20/20. In population samples the average acuity does not drop to the 20/20 level until age 60 or 70. Always remember that the 20/20 reference standard does not refer to the average acuity of American eyes, just as the US standard foot is defined independently of the “normal” length of American feet.


Welcome to the Precision Vision family, take a moment to get to know us!

This month’s spotlight is on a member of our Finance Team. Desiree has been with Precision Vision since March of 2021. As an Accounting Assistant, Desiree supports all the Finance functions required to maintain smooth operations for our customers,

suppliers and PV personnel. Desiree brings her calm, quiet demeanor to the office and sprinkles in a great sense of humor, making her a pleasure to work with.

Here is a little more about Desiree that you may not know:

Name: Desiree

Department: Finance

How long have you been with Precision Vision?: 1.5 years

What is the most rewarding thing about serving the eye care industry?: For me, it is the ability to play a small role in improving the quality of life for others.

Hobby: Spending time with my family and friends

Birth Month: October

Favorite Movie: National Lampoons Christmas Vacation

Favorite Food: Pizza

Favorite Precision Vision manufactured product?: Teller Acuity Cards and the ability to test vision on infants. My Son has worn glasses since he was an infant so vision tests that are specific to infants and young children always have a special place in my heart.

What is your favorite Precision Vision core value?:

Authenticity is real. I think being open and honest is a tremendous core value to have as a company and one that really sets Precision Vision apart from others. Knowing that Precision Vision embraces this value gives a sense of comfort and trust to us employees, as well as our customers.