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.
- The ideal tint and coating for the environment
- Prescription sunglasses to see more clearly and safely
- UV protective
- 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 vapor 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 small droplets. The treatments work by minimise 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-rflection 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 its 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 does vary widely. Opposite to a contact lens surface (ideally hydropphyllic) fluids ideally roll off easily so droplets need to sit up very high on the surface. As these top coats are very very thin they do wear off over time, how much they wear off depends on a wide variety of factors but on average usage they are good for 2 – 3 yrs at least.
Coating quality is such a wide spectrum depending on a huge number of factors from:
• the make up 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 prior to polymerisation etc. etc.
• the hard coating materials
Optifog cloth is an activator to go with the molecular nature of the optifog lens coating.
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