Precision Vision Pelli-Robson Contrast Sensitivity Charts

The Precision Vision Pelli-Robson Contrast Sensitivity Charts are a great way to assess how effectively a patient can distinguish between low-contrast objects. Regular contrast sensitivity testing can also have uses in diagnosing other conditions, helping professionals to catch early signs of Parkinson's, glaucoma, and cataracts. This particular chart has also been designed to enable acuity vision testing at 1 metre away.

What's Included?

• 2 x Contrast Sensitivity Charts
• Score Sheets

What Is the Function of a Contrast Sensitivity Chart?

A contrast sensitivity chart is designed to allow eye-care specialists to assess how well a patient can distinguish low-contrast objects. The test enables optometrists and similar specialists to measure how effectively the patient can distinguish between finer and darker increments of light. The regular testing of contrast sensitivity is crucial to detecting early signs of conditions like Parkinson's, glaucoma, and cataracts.

How Can I Display These Sensitivity Charts?

Two charts are supplied with this unit. Both of these charts can be easily mounted onto a wall or easel to create a clear display.

Key Features and Benefits

• Pack of two contrast sensitivity charts
• Designed to measure how well a patient can distinguish between low-contract objects
• Uses traditional Sloan optotypes for visual acuity testing at 100cm, or 1m distance
• Offers a means of assessing how well the patient sees large, faint objects 
• Regular use helps with detecting early signs of Parkinson's, glaucoma, and cataracts
• Letter sequences are grouped into threes, with two sets of three on each line
• Contrast decreases between triplet letter groups
• Chart adheres to official luminance, font, and letter spacing recommendations 

Technical Specifications

• Illumination of 85cd/m² provides good results
• Use at 100cm (1m)
• Chart Dimensions: 
  • Boxed (WxHxD): 63 x 93 x 3cm
  • Unboxed (WxHxD): 60 x 85 x 1cm