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Clinical Research

Our range of products include Original Series Sloan Letter Vision Chart, ETDRS Illuminator Cabinet (Precision Vision) 2425, 2110 Original Series Sloan Letter Etdrs (Chart R), Bailey Lovie Chart Set, Colenbrander Mixed Contrast Chart and Tumbling E Series ETDRS (Chart 3).

Original Series Sloan Letter Vision Chart
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Digital (LED Back Lit)No
MaterialPlastic
LanguageEnglish
Usage/ApplicationEye Testing
BrandPrecision Vision USA
Size24.5x25.5 in

 

Precision Vision USA

Backed by years of industry experience, we are engaged in offering a premium quality range of # 2110 Original Series Sloan Letter Vision Chart Vision Chart.

Other Details:

  • Only standardized format accepted in studies sponsored by the National Eye Institute.
  • Designed for use in clinical studies and low vision evaluations where accurate, repeatable visual acuity measurements are required.
  • Can be wall-mounted.
  • ETDRS charts use a geometric progression from line to line, making only the optotype size a variable. Lines and optotypes have been calibrated to be equally difficult. ETDRS chart is reliable for accurate acuity testing in clinics, research, and studies world wide.

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  • ETDRS Illuminator Cabinet (Precision Vision) 2425
  • ETDRS Illuminator Cabinet (Precision Vision) 2425
  • ETDRS Illuminator Cabinet (Precision Vision) 2425
ETDRS Illuminator Cabinet (Precision Vision) 2425
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Specific Testing By PartRetinal Changes
Model Name/Number2425
BrandPrecision Vision USA
LanguageEnglish
ShapeRectangular
Testing Distance13 feet / 3 Meter

The first and still the world standard for retro illumination of vision testing charts. Most frequently used with ETDRS charts for research and education. Retro Illuminated cabinet is available in two colors for coordination with clinical settings. With the use of the Adjustable Castor Base ( No. 2426), cabinet is mobile for easier testing in multiple settings. Illuminator cabinet is also available in different voltages for world wide use.

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2110 Original Series Sloan Letter Etdrs (Chart R)
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Digital (LED Back Lit)Yes
BrandPrecision Vision
MaterialPVC/Plastic
Size24.5x25.5 in
Item Weight250gm

Precision Vision USA
2110 
  • ETDRS charts use a geometric progression from line to line, making only the optotype size a variable. 
  • Lines and optotypes have been calibrated to be equally difficult. 
  • ETDRS chart is reliable for accurate acuity testing in clinics, research, and studies world wide.


Additional Information:

  • Item Code: 2110

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Bailey Lovie Chart Set
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Bailey Lovie Chart Set

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Digital (LED Back Lit)Yes
BrandPrecision Vision USA
MaterialHDPE
ColorWhite

 

Precision Vision USA


The charts standardized the test task so that size is the only significant variable from one row to the next.
There are 5 letters per row, between-letter and between-row spacings equal to letter size, size progresses by a constant ratio (0.1 log unit = 1,26x), and letter difficulties are balanced for each row. Contrast Sensitivity. The difference in the number of letters read on the high and low contrast charts provides a measure of the slope of the Contrast Sensitivity Function.

Additional Information:

  • Item Code: 5000
  • Delivery Time: 1 week

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Colenbrander Mixed Contrast Chart
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Digital (LED Back Lit)Yes
BrandPrecision Vision
MaterialPVC/Plastic
Item Weight250gm

Precision Vision USA
Colenbrander Mixed Contrast Chart (#
4100)

The Mixed contrast chart contains Black and 20% Weber (11% michelson) contrast.

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Tumbling E Series ETDRS (Chart 3)
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Digital (LED Back Lit)Yes
BrandPrecision Vision USA
MaterialPVC/Plastic
Item Weight250gm

Precision Vision
 2305B

  • Tumbling E charts, also referred to as Illiterate E tests, are useful for testing  patients that are illiterate or mute. 
  • Patients simply have to sign or gesture which direction they see the E facing. 
  • Tumbling E charts are considered highly reliable and are second only to Landolt C tests. 
  • Both tests use only one optotype positioned differently and are useful for testing several types of patients.


    Additional Information:

    • Item Code: 2305B

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    Tumbling E Series ETDRS (Chart 1)
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    Digital (LED Back Lit)Yes
    BrandPrecision Vision
    MaterialPVC/Plastic
    Item Weight250gm

    Precision Vision
    2305

    • Tumbling E charts, also referred to as Illiterate E tests, are useful for testing patients that are illiterate or mute. 
    • Patients simply have to sign or gesture which direction they see the E facing. 
    • Tumbling E charts are considered highly reliable and are second only to Landolt C tests. 
    • Both tests use only one optotype positioned differently and are useful for testing several types of patients.


      Additional Information:

      • Item Code: 2305

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      Original Series Sloan Letter ETDRS (Chart 2)
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      Digital (LED Back Lit)Yes
      BrandPrecision Vision
      MaterialPaper/Cardboard
      Item Weight250gm

      Precision Vision USA
      2112 

      • ETDRS charts use a series of three charts with different permutations of optotypes. ETDRS Chart 1 is used to test the right eye’s acuity.
      •  ETDRS Chart 2, and Chart R are used to test the visual acuity in the left eye and both eyes, respectively. 
      • The use of three ETDRS eye charts to test the visual acuity of one patient prevents memorization and helps increase accuracy and consistency in results.


      Additional Information:

      • Item Code: 2112

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      Tumbling E Series ETDRS (Chart 2)
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      Digital (LED Back Lit)Yes
      BrandPrecision Vision
      MaterialPaper/Cardboard
      Item Weight250gm

      Precision Vision
      2305A

      • Tumbling E charts, also referred to as Illiterate E tests, are useful for testing patients that are illiterate or mute. 
      • Patients simply have to sign or gesture which direction they see the E facing. 
      • Tumbling E charts are considered highly reliable and are second only to Landolt C tests. 
      • Both tests use only one optotype positioned differently and are useful for testing several types of patients.


        Additional Information:

        • Item Code: 2305A

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        Original Series Sloan Letter ETDRS (Chart 1)
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        Digital (LED Back Lit)Yes
        BrandPrecision Vision
        MaterialPVC/Plastic
        Item Weight250gm

        Pecision Vision USA
        2111
        • ETDRS charts use a series of three charts with different permutations of optotypes. ETDRS Chart 1 is used to test the right eye’s acuity. 
        • ETDRS Chart 2, and Chart R are used to test the visual acuity in the left eye and both eyes, respectively. 
        • The use of three ETDRS eye charts to test the visual acuity of one patient prevents memorization and helps increase accuracy and consistency in results.


        Additional Information:

        • Item Code: 2111

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        BRVT The Berkeley Rudimentary Vision Test
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        model no.4500
        BrandPrecision Vision

         

        Precision Vision USA

        BRVT The Berkeley Rudimentary Vision Test (# 4500)

        For Visual acuity levels beyond the limit of the letter charts, the common practice is for clinicians to categorize vision according to whether the patient can count fingers (CF) or detect hand motion (HM), but there is no recognized or standard procedures for doing this.

        Additional Information:

        • Item Code: 4500
        • Delivery Time: 1 Week

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        Minus 0.37 Spherical Individual Trial Lens
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        MaterialGlass
        Usage/ApplicationHyperopia
        BrandPrecision Vision USA

        Precision Vision USA

        0.37 Spherical Individual Trial Lens (#7026)

        Made of glass and chrome tabbed lens ring with full aperture.

        Additional Information:

        • Item Code: 392037
        • Delivery Time: 1 week

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        • ETDRS Cabinet Replacement Lamp With Fenestrated Sleeves ( Part No. 2427d)
        • ETDRS Cabinet Replacement Lamp With Fenestrated Sleeves ( Part No. 2427d)
        • ETDRS Cabinet Replacement Lamp With Fenestrated Sleeves ( Part No. 2427d)
        • ETDRS Cabinet Replacement Lamp With Fenestrated Sleeves ( Part No. 2427d)
        • ETDRS Cabinet Replacement Lamp With Fenestrated Sleeves ( Part No. 2427d)
        ETDRS Cabinet Replacement Lamp With Fenestrated Sleeves ( Part No. 2427d)
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        Wattage5W
        Bulb MaterialGlass
        Voltage220V
        Base TypeG4
        Lighting TypeFlorescent Lamp for 2425 Cabinet
        Color Temperature2700K
        Manufactured byGE USA

        Precision Vision USA 

        Replacement Lamp with fenestrated Sleeves (#2427D)

        Aimed at a prosperous growth in this domain, we are engaged in offering an excellent quality range of 2425 ETDRS Cabinet Replacement Lamp Tube.

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        3 Jackson Cross Cylinder With Metal Case
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        BrandGood-Lite USA
        ColorSilver
        model no.525200

        Good-Lite USA

        Set of 3 Jackson Cross Cylinders (#525200)
        • Set of 3 Jackson Cross Cylinders in a metal box with 0.25, .50 and 1.00 lenses. 
        • Used to determine orientation of astigmatism correction, the power of the astigmatism correction and the axis. 
        • Lenses are 35mm with axis markings and handles are 70mm long


        Additional Information:

        • Item Code: 525200

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