FASHIONABLE SPECTACLE FRAMES
Lifestyle-specific spectacle and contact lenses and frames allow the best vision for specific tasks and environments. Advances in the technology of frame, spectacle and contact lens materials and designs mean more benefits and features can be experienced.
Safety fire goggles and safety spectacles for projectiles, radiation
Antifogging, anti-reflective and anti-scratch treatments.
Catering for digital eyestrain and filtering toxic wavelengths
Dedicated pairs or combined as in progressive lenses for the ideal working range, ergonomics, and postural comfort
Driving glasses to improve reaction times, road safety and to reduce fatigue
Sports specific goggles, safety, and wrap glasses
Fogging is caused by water vapour condensation. This condensation occurs when water vapour from sweat, breath, and ambient humidity lands on the cold surface of your lenses. The vapour cools and changes into tiny drops of liquid, forming a film that you see as fog.
Most anti-fog lenses use anti-fogging agents, which are chemicals that prevent water condensation in tiny droplets. The treatments work by minimising surface tension, resulting in a non-scattering film of water instead of single droplets.
The water vapour will still condense over time but is typically slowed down. The length of the delay depends on the quality of the anti-fog treatment and environmental conditions.
Many anti-reflection coatings that offer anti-fog agents on lenses typically don’t last because day to day cleaning destroys it.
The correct “fog sticks” or cloths and sprays can help. This way, it’s fog-resistant for when you need it to be.
The chemicals in the cloth will prevent water condensation.
The hydrophobic (repelling water) / oleophobic (repel oils) characteristic of coatings do vary widely. Opposite to a contact lens surface (ideally hydrophilic), fluids ideally roll off easily, so droplets need to sit up very high on the surface. As these topcoats are very thin, they do wear off over time; how much they wear off depends on a wide variety of factors, but they are suitable for 2 – 3 yrs on average usage.
Coating quality is such a broad spectrum depending on a considerable number of factors from:
• the makeup of the different layers
• the thickness of the layers
• the process
• the substrate, including how the material is polymerised, how the liquid monomer is treated before polymerisation, etc.
• the hard coating materials
Optifog cloth is an activator to go with the molecular nature of the optifog lens coating.