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Types of correction

Myopia and hyperopia

The most common disorders

Myopia (nearsightedness, or trouble seeing things far away) and hyperopia (farsightedness, or trouble seeing things close up) are the most common disorders and can be corrected with single vision ophthalmic lenses.

Myopia is an imbalance between the length of the eye and the curvature of the cornea or lens. Because the eye is too long or too curved, the image perceived by a nearsighted person is not focused directly on their retina. When the person looks into the distance, the image therefore appears blurred because it is focused in front of the retina.

Hyperopia, on the other hand, results from the fact that the image is formed behind the retina. It is a refractive disorder that requires the eye to work to focus and avoid blurred vision.

Simple vision lens Simple vision lens


Based on your needs and restrictions, our Opto-Réseau eye care professionals will recommend the best type of lens to correct your myopia or hyperopia.

Single vision (or unifocal) lenses

Providing one type of correction over the entire lens to improve near- or far-distance vision.

Single vision lenses customized

Customized to your frames, face, lifestyle, and vision habits. They accommodate the shape, movements, and requirements of your eyes based on how you wear your lenses (frame adjustment).

Specialized single vision lenses

Specialized to reduce eyestrain.


Starting in your mid-40s

Presbyopia is caused by a loss of flexibility in the lens, which causes the eye to focus less well on nearby objects. It usually occurs to people in their forties, even ones who have never had any vision problems. Like aging and taxes, presbyopia is inevitable!


Based on your needs and prescription, your Opto-Réseau optometrist can recommend different options to correct presbyopia:

  • Progressive lenses
  • Proximity lenses (e.g., for computer work)
  • Reading glasses (single vision)
  • Bifocal or trifocal lenses (two or three visual areas)
  • A combination of several pairs of glasses

Progressive lenses

Progressive lenses give you clear vision at any distance. The upper part of the lens provides distance vision, while the lower part provides near vision. The transition between the two parts is smooth, and the intermediate vision in the centre of the lens is fully functional.

Progressive lenses Progressive lenses

Customized high-tech progressive lenses: Tailored to your lifestyle for maximum comfort

Your optometrist may also suggest customized progressive lenses tailored to your face, habits, daily activities, and behaviour. That means your lenses will provide instant focus at any distance and image stability when you move your head from side to side, reduce blurring, and much more. Wearing progressive lenses will make things easier because they’ll be tailored to your life.

The wide selection of progressive lenses available at Opto-Réseau clinics includes the Essilor Varilux X and E series, Nikon SeeMax, Zeiss Precision, and Hoya iD.MyStyle and iD Lifestyle lines.

Expert advice

Standard or specialty lenses?

Specialty lenses offer more comfortable vision in specific situations, whether you wear single vision or progressive lenses. If you have a job or hobbies that require a lot of near vision or if you spend a lot of time behind the wheel or often work in front of a screen, specialty lenses could make everyday life easier while improving your vision and reducing eyestrain.

Based on your visual needs, work environment, or leisure activities, your Opto-Réseau eye care professional may also recommend specialty lenses such as Essilor Varilux Digitime, Nikon Home & Office, Zeiss OfficeLens, or Hoya iD Space/Screen/Zoom lenses. Lenses such as Essilor Eyezen, Nikon Smart Boost, Zeiss Energize Me, and Hoya Sync are also known to reduce eyestrain in single vision wearers.

What are your vision needs?

To maintain optimal vision quality in everything you do, you should consult an optometrist regularly to assess your vision needs. They can suggest the best products or combinations of products tailored to your situation.

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