Cardiff 5667R Combined Contrast Test

The Cardiff 5667R Combined Contrast Test is designed to test contrast sensitivity in toddlers and young children. Like the Cardiff 4740R Standard Acuity Test, this test uses vanishing optotypes and non-verbal assessment to carry out the evaluation. As a result, it is also suitable for testing contrast sensitivity in older children and adults with intellectual impairment.

Features and Benefits of the Cardiff 4667R Contrast Test

• A visual testing kit designed to determine contrast sensitivity
• Designed for testing toddlers and young children
• Suitable for older children/adults with intellectual impairment
• Tests sensitivity levels from 2.17 to 100
• Kit consists of 36 laminated cards with vanishing optotypes

What is a Contrast Sensitivity Test?

Contrast sensitivity is the ability to detect large but faint targets. There are some pathological conditions that reduce contrast sensitivity without impairing visual acuity, and a contrast sensitivity test can help to identify these conditions. 

How the Test Works

This testing kit includes 36 laminated cards, each with a large vanishing optotype consisting of a light band bordered by two darker bands. The degree of contrast between these bands decreases across the card series, and in totality the test covers 12 contrast levels using three cards at each level.

The test cards are shown to the patient one by one, with the examiner noting the eye movements of the patient when shown each card. When the optotype shown to the patient lies beyond their contrast limit it merges with the background, becoming invisible to them. The examiner will be able to detect that the optotype lies beyond the patient's contrast limit by observing their eye movements, and will then be able to quantify the contrast sensitivity of the patient.

Sensitivity Levels Tested

The contrast levels tested start at 46% and decrease to 1%, which equates to sensitivity levels from 2.17 to 100. When the Cardiff Contrast Test is carried out at a distance of 50cm the targets represent 1.9 cycles per degree (or 6/90, 20/300) and at a distance of 1m the targets represent 3.8 cyclesper degree (or 6/45, 20/150).

At a distance of 25cm the targets represent 1.0 cycle per degree (or 6/180, 20/600). Results from the test are presented in a manner that is consistent with scoring of the Pelli-Robson Contrast Test for adults.

Delivery Expectations

This product is usually delivered by 24 hour courier. For orders that are placed before 2pm Monday to Friday, your order should usually be dispatched the same day for next working day delivery.

Delivery is free for orders over £65 (ex VAT) to UK mainland addresses. For all other UK orders, delivery is only £4.95 (ex VAT).

Delivery Charges

Some larger or heavier orders will be couriered to Northern Ireland, Scottish Highlands or UK offshore islands. In these cases, we may need to contact you to arrange for a courier supplement charge, but only if your order is one that requires a courier and you live in Northern Ireland, Scottish Highlands or UK offshore islands.

Delivery Estimations

The delivery expectation for medical supplies on our website is specified on each particular product page. Where a delivery expectation is not stated, we will dispatch the goods as quickly as possible, normally within 24 to 48 hours on working days, so that you receive your medical supplies promptly.

If you would like up-to-the-minute delivery information on your medical supplies order, please call our Customer Care Team on 020 7501 0593 who will be able to give you further tracking information or progress details for your order.

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European Delivery

Unfortunately, due to restrictions with our couriers, we are unable to ship items outside of the UK. We apologise for any inconvenience that this may cause.