HOYA ITRACE SERIES

The Tecnis on the other hand negate the entire positive spherical aberration of the cornea to provide for a better image quality for the average patient who would have around. 28 microns as these lenses typically have a negative spherical aberration of around -.17 micron to -.20 micron. 1 micron of residual positive spherical aberration for a patient who would have a corneal spherical aberration of around. Thus both Alcon and Hoya aspheric lenses leave the patient with around. This is arguably, to provide not only a good image quality ( by negating positive aberration of cornea ) but also providing an acceptable depth of field ( by leaving a small amount of residual spherical aberration ). Among theses lenses, the AcrySof IQ, Vivinex XY1 and 250 and 251 do not totally negate the entire positive corneal spherical aberration and leaves a little amount of residual positive spherical aberration in the eye. Alcon AcrySof IQ (SN60WF), Tecnis (ZCB00) and Hoya Vivinex or 250,251 IOLs are lenses that incorporate negative spherical aberration in their optics thus negating the corneal spherical aberration of the cornea. However it is important to classify two groups of such aspheric IOLs - one that are negative spherical aberration IOLs and thus negate the positive spherical aberration of lens, and the other group of lenses which are zero (spherical) aberration lenses and neither adds nor negates corneal aberration. There are a number of IOLs that are aspheric. When it comes to optics, one important aspect that has been particularly important and has been considered as a 'must - have' feature in IOLs is the benefit of spherical aberration correction of cornea. Accordingly, a wide variety of IOLs have an array of features which is often claimed to give a better image quality to the patient. Like material, the optics of an IOL play no less an important role, particularly when today's patients do not just look forward to vision restoration, but also the quality of the vision delivered. In that article, ' Choosing right intra ocular lens for cataract surgery - material ' we had in detail talked about the material aspects of an IOL. () we had noted that intra ocular lens (IOL) features can largely be categorized into material, design, optics and delivery.

HOYA ITRACE SERIES

Remember, in the first part of this series Continuing our series on choosing the right Intra Ocular Lens we will discuss on the OPTICS of an IOL with special focus on aspheric IOLs. Advanced biometry for advanced lenses Advanced IOL platform provides benefits for surgeons and patients 2013 ASCRSASOA San Francisco Show Daily Supplement This Show Daily supplement is sponsored by Alcon.

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