Preverbal children are the most demanding group of patients which range from new borns to small children of up to two and a half years who cannot speak to communicate clearly.
Preverbal children are the most difficult patients for doctors working in rushy OPDs because the mothers are keen in expecting a clear and rapid answer from them about their kid's visual status. If a quick screening test exists, it solves the problem of both the doctor and the patient's mother and the valued time of the health facility. IZZP Device (see attachment) is being used in Pakistan and bordering areas effectively as a visual screening device for preverbal children.
IZZP Device is constructed on the basis of three principles,
1. Preferential looking 2. Contrast sensitivity and 3. Visual attentional function of the babies.
I have utilized IZZP Device for over two decades and found it as an adequate tool to answer the reservations of young mothers about the visual status of their newly born babies.
I had once observed this equipment in Prof. Imtiaz Shah 's office in Eye Depertment CMC Larkana.
I appreciate the convenience with which one can use it.
I have never used it myself.
Thanks Prof Javed Niazi, as a researcher you never miss any opportunity to find new open doors of knowledge. I appreciate it.
The Teller Acuity Cards Test is a simple, low cost method to asses the VA in preverbal age. It is based in a behavioral preferential looking pattern or recognition
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