User's Manual

6 CDC-1 -----------------------------------------------------------------------------------------------------------------------------------
1.1. Outline of Product
The Shanghai Huvitz Automatic Visual Acuity Tester (CDC-1) is a computerized chart presenting device that provides
charts for refractive correction test and various functional tests such as cross cylinder, red/green, binocular balance,
fusion and suppression, heterophoria, associated phoria, aniseikonia, stereopsis, and dominant eye test for
heterophoria. Since the Digital Chart implements charts on the LCD panel by adopting the cutting edge digital
technology, it’s not only faster and quieter but also equipped with multifarious convenient functions. The contrast
sensitivity and the background luminance of the chart are adjustable for environmental needs. Also the image gallery
contains a dozen of image clips that the examiner could utilize during the examination. Various masking and random
functions would be helpful for a punctual vision test.
The examiner may execute all the charts and functions by using the remote controller and when it is connected to
Shanghai Huvitz Digital Refractor, the Operation Panel can also control this product.
1.2. Intended Use
Shanghai Huvitz Automatic Visual Acuity Tester displays optotypes or symbols on LCD for eyesight test within visible
distance using electronic power.
1.3. Classification
• Classfication of Product::
- EU – Class I according to Annex VIII (Rule 13) of the Medical Device Regulation MDR
• Resistance against electric shock: Class I
• Protection against harmful ingress of water: Ordinary, IPX0
• Degree of safety in the presence of a flammable anesthetics mixture with air or with oxygen or with nitrous
oxide: Not suitable for use in the presence of a flammable anesthetics mixture with air or with oxygen or
with nitrous oxide
• Mode of Operation: Continuous
1.4. Patient Restriction
• Patient who cannot keep a comfortable position.
1.5. Patient Requirement
Patient tested with this device should keep concentration for several minutes and follow below items.
- Keep eyes wide open.
1. Introduction