Tumbling E Chart

Installs

51.9k

Rating

0.0

Rating count

< 100

Category	Medical
Developer	ZIJIAN HUANG
Price	Free
First release	2/26/2019 (6 years ago)
Version	2.7.2
In-app purchases	No
Contains ads	No
Content rating	Rated for 3+
Package name	com.fonlow.E

View on Play Store

Core Metrics

Data Breakdown

Date	Rating Count	Average Rating	Installs	Version
6/8/2025	0	0.000	51,948	2.7.2

Details

Prevention is better than cure. Designed for children older than 6, parents with young children, and general practitioners, this app displays optically precise optotypes of tumbling E chart for you to measure distant visual acuity accurately in order to detect nearsightedness or myopia and early,  so you can take preventive measures and seek help from medical professional early to prevent pseudomyopia from becoming myopia, or prevent nearsightedness from getting worse.

Predefined Test Distances:
* 6, 5, 4, 3, and 2 meters
* 20, 15, 12, 10, 6 feet

At exactly 6 meters away from the “patient”, the optotypes on the 6/6 line (Decimal 1.0 or LogMar 0.0) shall subtend 5 minutes of arc, which means that the chart should be sized such that these optotypes are 8.73mm tall, and the topmost (Snellen Fraction 6/60, Decimal 0.1, or LogMar 1.0) optotypes should be 87.3 mm tall. At exactly 20 feet away from the “patient”, the topmost optotypes should be 88.7 mm tall, because 20 feet equals 6.096 meters. 

Scenarios:
1. "Doctor" and "Patient".
2. Self-diagnosis with a mirror.
3. Self-diagnosis with a Bluetooth keyboard.
4. Self-diagnosis within arm's reach.

Notations：
1. Decimal (0.50)
2. Fraction (20/40)
3. LogMAR (0.30)
4. Fraction (5/10)
5. Fraction (6/12)
6. MAR (2)
7. VAS or VAR (85)

Test Modes:
1. Autoplay
2. Manual

In Autoplay, the app calculates the score. For LogMAR notation,  the score is (LogMAR value of the best line read) + 0.02 x (number of optotypes missed). And the maximum missed is 3. For VAS notation, the score is an inversion of the logMAR scale, based on VAS=100-50xlogMAR. For other notations, the score is the notation value of the best line read and optionally minus number of optotypes missed, and the maximum missed is 2.

By default, setting "Play Interval Until Next Optotype" is none. Available intervals in second: 2, 4, 6, 8, and 10. If the "patient" could not recognize the optotype within the interval, this counts a miss.

Through enabling “Record Scores” in Settings, you can keep track of the progression of your visual acuity. Visual acuity scores of multiple testees could be recorded. Visual Acuity Score (VAS) is an inversion of the logMAR scale, based on VAS=100-50xlogMAR. It is more intuitive since higher values indicate better visual acuity.

In the scores review, score 100 in blue indicates the reference standard, scores above 100 in green indicates no myopia, while scores below 100 in red may indicate myopia. 

Testing for myopia takes several procedures and the first step is often to check distant visual acuity through a visual acuity chart. And the decrement of visual acuity may indicate the development of myopia.

Disclaimer:
While this app may replace Tumbling E Chart in print, however it cannot replace doctors and optometrists who carry out comprehensive tests for your eyes. Please visit optometrists regularly and seek help from medical professional at early signs of visual acuity problems.

More Apps byZIJIAN HUANG

Eye Charts

Installs: 20,583Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 11/5/2020Last change: N/A

More Apps inMedical

Freya - surge timer for labour

Installs: 65,971Score: 4.50Ratings: 463

Price: N/A

Version: N/AReleased: 12/23/2019Last change: N/A

Squeezy

Installs: 173,364Score: 4.71Ratings: 5,180

Price: N/A

Version: N/AReleased: 11/24/2014Last change: N/A

Mémo Périnatalité

Installs: 712Score: 2.09Ratings: 11

Price: N/A

Version: N/AReleased: 7/14/2021Last change: N/A

Human Anatomy Atlas 2026

Installs: 517,971Score: 4.76Ratings: 16,436

Price: N/A

Version: N/AReleased: 9/30/2016Last change: N/A

Codes Qc

Installs: 613Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 2/3/2021Last change: N/A

iMineIVF

Installs: 3,372Score: 1.46Ratings: 28

Price: N/A

Version: N/AReleased: 4/8/2016Last change: N/A

MDonCall - Practical Guide

Installs: 9,496Score: 5.00Ratings: 53

Price: N/A

Version: N/AReleased: 10/25/2012Last change: N/A

Monash University FODMAP diet

Installs: 488,306Score: 4.58Ratings: 3,986

Price: N/A

Version: N/AReleased: 11/6/2013Last change: N/A

INESSS

Installs: 12,452Score: 3.84Ratings: 35

Price: N/A

Version: N/AReleased: 6/5/2015Last change: N/A

BolusCalc

Installs: 25,201Score: 4.29Ratings: 64

Price: N/A

Version: N/AReleased: 12/23/2017Last change: N/A

Saunders Comp Review NCLEX RN

Installs: 226,102Score: 4.55Ratings: 2,282

Price: N/A

Version: N/AReleased: 3/13/2018Last change: N/A

Medicai DICOM Viewer & PACS

Installs: 26,935Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 11/1/2022Last change: N/A

Le Manuel MSD Professionnel

Installs: 1,214,160Score: 4.89Ratings: 2,773

Price: N/A

Version: N/AReleased: 12/21/2016Last change: N/A

Lippincott Nursing Advisor

Installs: 111,245Score: 5.00Ratings: 382

Price: N/A

Version: N/AReleased: 9/11/2013Last change: N/A

SymboTalk - AAC Talker

Installs: 236,281Score: 4.00Ratings: 387

Price: N/A

Version: N/AReleased: 1/8/2018Last change: N/A

Lippincott Procedures

Installs: 115,935Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 9/14/2015Last change: N/A

myTouchMD - for Patients

Installs: 60,049Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 4/26/2018Last change: N/A

Pathway – Medical Knowledge

Installs: 114,691Score: 5.00Ratings: 408

Price: N/A

Version: N/AReleased: 9/12/2022Last change: N/A

Opioid Conversion Calculator

Installs: 13,961Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 3/8/2023Last change: N/A

The Benefits Trust Claims App

Installs: 4,325Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 3/10/2023Last change: N/A

Net Check In - Northern Health

Installs: 6,631Score: 3.92Ratings: 78

Price: N/A

Version: N/AReleased: 7/29/2020Last change: N/A

KushKlub

Installs: 3,086Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 7/8/2022Last change: N/A

My Change Plan (MCP)

Installs: 4,255Score: 3.18Ratings: 11

Price: N/A

Version: N/AReleased: 1/4/2022Last change: N/A

Mental Health Tests

Installs: 635,895Score: 3.97Ratings: 1,930

Price: N/A

Version: N/AReleased: 8/22/2017Last change: N/A

iMD - Medical Resources

Installs: 98,453Score: 4.89Ratings: 1,027

Price: N/A

Version: N/AReleased: 8/21/2015Last change: N/A

Fast FODMAP Lookup & Learn

Installs: 186,860Score: 4.68Ratings: 5,835

Price: N/A

Version: N/AReleased: 4/1/2018Last change: N/A

Body Temperature Tracking App

Installs: 134,794Score: 4.17Ratings: 306

Price: N/A

Version: N/AReleased: 6/2/2016Last change: N/A

Blood Sugar - Diabetic Checker

Installs: 88,436Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 5/24/2024Last change: N/A

Pet Care Tracker - Dog Cat App

Installs: 96,612Score: 4.75Ratings: 4,798

Price: N/A

Version: N/AReleased: 2/14/2021Last change: N/A

TempStars - Book Dental Jobs

Installs: 8,792Score: 4.03Ratings: 219

Price: N/A

Version: N/AReleased: 10/18/2016Last change: N/A

Blood Sugar Diary for Diabetes

Installs: 155,785Score: 3.93Ratings: 1,436

Price: N/A

Version: N/AReleased: 3/15/2016Last change: N/A

HEARING AID APP:PETRALEX 4 EAR

Installs: 1,754,475Score: 4.21Ratings: 14,466

Price: N/A

Version: N/AReleased: 4/1/2014Last change: N/A

Medication Reminder & Tracker

Installs: 208,429Score: 4.27Ratings: 6,136

Price: N/A

Version: N/AReleased: 5/13/2013Last change: N/A

RxVigilance

Installs: 443Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 2/4/2025Last change: N/A

Pollin

Installs: 1,342Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 10/10/2023Last change: N/A

Coughlin Mobile

Installs: 13,827Score: 3.17Ratings: 18

Price: N/A

Version: N/AReleased: 10/5/2021Last change: N/A

Go back to the Home page