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You are here: Home / Spectacle Lenses

Spectacle Lenses

As technology advances, so do spectacle lenses. In the past spectacles lenses were made of glass where as today they are made of high tech plastic materials.

When choosing lenses there are three decisions that have to be made:

  1. What type of lens… Single vision, Bifocal, Multifocal, Office or Digital.
  2. What type of lens material…  Standard plastic or Hi-Index.
  3. What lens coating… Anti-reflecting, Photochromatic, Sunglass, Blue blocking anti-reflecting

The best combination of options is based on your personal preference, lifestyle, prescription and work requirements.

1) What Type of Lens

Single Vision

The lens power is the same  all over the lens and assists the wearer to focus either at distance , near, intermediate or all of these areas.

 Bifocal Lenses

These are older style lenses occasionally used. There are two lens powers on the lens, the upper portion helps the wearer  focus at distance and the lower at near. There is a line visible that separates the lens powers.

 Multifocal Lenses

These are lenses designed to focus at distance, intermediate and near. The upper part of the lens is for distance, the middle for intermediate and the lower for near. There are no lines visible on the lenses and the power of the lens changes  as you move up and down the lens..Read More… OSA Accolade Freedom 

Office Lenses

For people that work in an office environment who require near to intermediate vision. They offer a large field of vision at close and intermediate distances,  allowing a person to adopt an unimpaired view of the screen with a natural posture and sitting position….Read More… Zeiss Offfice Lenses

Digital Lenses

These lenses are similar to multifocal lenses, ie they have a distance , intermediate and near power. They are prescribed mainly to assist younger persons   focusing on digital  devices and  persons starting to experience age related near vision loss..Read More… Zeiss Digital Lenses 

2) What Type of Lens Material

Standard plastic material is appropriate for low power prescriptions.

Hi Index materials are plastic materials of higher density  designed to reduce the thickness of the lens. Hi index lenses look much better when a prescription is very high. 

 There are three distinct categories of high index material…1.6, 1.67 and 1.74.

The diagram below illustrates  the thickness reductions of different hi-index materials and prescriptions.

3) What Type of Lens Coating

Anti-Reflecting

A coating applied to  the lens surface  to reduce reflections.  It helps reduce eyestrain with computer use, enhances night vision and allows you to see clearer through the lens by increasing light transmission through the lens to 99%.

Photochromatic

A coating on spectacles lenses that allows lenses to darken on direct exposure to  sunlight and return to clear when indoors. This coating allows your normal spectacles to become sunglasses in direct sunlight.

Sunglass 

A lens coating that reduces direct and reflected sunlight from entering the eyes and also blocks ultaviolet  light.

Sunglass coatings can be either a tint or polarised coating. A tint coating will reduced direct sunlight and some reflected sunlight. Whilst a polarised coating will reduced direct and reflected sunlight..Read More… Essilor Experio Polarised Lenses

Blue Blocking Anti-Reflecting

A lens coating that blocks high energy blue light  emitted by electronic devices. Blue light can adversely impact your circadian rhythm ( the body’s natural sleep & wake cycle ).

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Phone: 03 9742 5517

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Independent Optometrists servicing the Wyndham area since 1989, Andre Mallet and Chris Karanasio are registered health professionals providing full eyecare services. Medicare bulk billed eye examinations and Health Fund Direct Billing available.

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