ABO NOCE Practice Test

What thickness is prescribed for standard lenses in terms of safety compliance?

1. 1mm

2. 3mm

3. 5mm

4. 2mm

The correct answer is: 1mm

Standard lenses are typically prescribed with a minimum thickness of 1mm to ensure safety compliance. This thickness is established based on safety regulations and standards that aim to provide adequate impact resistance and durability during everyday use. A lens thickness of 1mm is considered sufficient for regular wear, providing a balance between lightness, comfort, and the ability to withstand minor impacts. Thinner lenses, such as those less than 1mm, may not offer the necessary protection or structural integrity to be deemed safe, while thicker lenses may be less comfortable and heavier without providing additional safety benefits for everyday use. Therefore, the choice of 1mm aligns with established safety standards in opticianry and eye care practices.