LEA SYMBOL CHART TEST

1. ■ ANNIE
■ SHARDA UNIVERSITY
■ OPTOMETRY 3RD YEAR

2. Contents
INTRODUCTION
LEA TESTING
CONDITIONS
PROCEDURES
AVANTAGES & DISAVATAGES

3. INTRODUCTION
LEA SYMBOL CHART
FOR TESTING VISUAL ACUITY FOR PATIENT LESS THAN 5
YEARS OF AGE
01

4. Lea symbol chart test is a series of pediatric vision tests
designed specifically for children who do not know how to read
the letters of the alphabet that are typically used in eye charts.
There are numerous variants of the LEA test which can be used
to assess the visual capabilities of near vision and distance
vision, as well as several other aspects of contrast sensitivity

5. • The test consist of four optotypes which are
apple,house,square and circle ..
• They are recognized easily by kids.
• It is arranged in combination of five symbols per line.
• In this test the child sees symbols at distance chart and
matches symbol of different size presented on it to
similar symbol on key card

6. LEA TESTING CONDITIONS
• Ensure the test is done in a well illuminated room
• The telescopic stick is used in pointing the
symbol for the patient by the examiner
02

7. • Do not point to the symbol to be read because it makes fixation easier,
especially in case of amblyopia (lazy eye) or CVI.
• A child with an amblyopic eye or irregular saccades may typically skip
symbols within a line of symbols. If skipping symbols occurs, report
whether it occurred in only one eye or in both eyes. The optotype in the
middle is most often skipped.
• Ensure that the child understands the test to avoid
misunderstanding and time consumption

8. PROCEDURES OF LEA
03

9. LEA SYMBOL BOOKLET CHART LEA SYMBOL CHART

10. A
B
D
• Aim : TO PERFORM A LEA SYMBOL CHART TEST
• MATERIAL : LEA CHART AND TELESCOPIC STICK
• This test is done at a distance of 3meters
• The chart is available in simple and spiral booklet
• The examiner shows normally the center symbol but
can also ask for other symbol
• The patient is given a booklet containing the charts
and asked to choose the symbol
• These symbols are fixed and kept in a standard like
apple ,house ,circle ,square.
• The size of the picture goes decreasing from 3/9.5 to
3/2.4

11. TELESCOPIC STICK

12. ADVANTAGES & DISADVANTAGES
04

13. ADVANTAGES
1. Can be performed in
3-5meter
2. They won't cram
3. Can be Performed in
amblyopic children

14. DISADANTAGES
1. Needs child's co-operation
2. Time consuming
3. It's not ideal for visual
acuity but we can know the
approximatio

15. THANK YOU
By: Annie😊