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LEA SYMBOLS Near Vision Screener

LEA SYMBOLS Near Vision Screener

Product Price: Rs 15,000 / PieceGet Best Price

  • Designed for amblyopia screening and testing children with difficulties using standard near vision cards
  • Double-sided standardized vision test
  • Gray background with white rectangles spaced at 100% surrounding each line of symbols
  • Line sizes range from 20/400 to 20/16 (6/120 to 6/4.8) equivalent, 0.05 to 1.25
  • Includes a response key printed on the test card
  • Flashcards and instructions are included
  • Dimensions: 8" x 10" (20.3 cm x 25.4 cm)
  • Testing distance: 16"/40 cm
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LEA SYMBOLS Low Contrast Test 10M

LEA SYMBOLS Low Contrast Test 10M

Product Price: Rs 32,000 / PieceGet Best Price

This test is designed for quick assessment of low contrast visual acuity at various contrast levels: 25%, 10%, 5%, 2.5%, and 1.25%.

Visual acuity is measured by determining the distance at which symbols are discerned.

The test includes 10M symbols, with corresponding visual acuity values of 0.10 at 1 meter, 0.05 at 0.5 meters, and 0.3 at 0.3 meters, facilitating easy calculation of visual acuity.

A table for converting measured values to Snellen equivalent visual acuity values is provided.

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LEA LOW CONTRAST GRATING ACUITY TEST
  • LEA LOW CONTRAST GRATING ACUITY TEST
  • LEA LOW CONTRAST GRATING ACUITY TEST

LEA LOW CONTRAST GRATING ACUITY TEST

Product Price: Rs 49,000 / PieceGet Best Price

  • Contrast sensitivity curve measurement involves the use of four gratings.
  • Gratings are presented at two contrast levels: 10% and 2.5%.
  • Two grating frequencies are utilized: 0.5 cycles per centimeter (cpcm) and either 8 cpcm (for the 10% contrast level) or 4 cpcm (for the 2.5% contrast level).
  • Testing aims to determine the threshold distance at which the individual can perceive the direction of the grating lines.
  • The measurement setup includes nomograms, instructions, and recording forms.
  • The apparatus measures 8 inches (20 cm) in diameter.
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