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Low_resolution_Thesis_CDD_221009_public - Visual Optics and ...

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CONCLUSIONS<br />

Conclusions<br />

This thesis addresses physical aspects related to two procedures<br />

applied to the cornea to change its refractive state <strong>and</strong> consequently,<br />

to change the optical properties of the eye: corneal laser refractive<br />

surgery <strong>and</strong> contact lenses for the correction of myopia <strong>and</strong> the<br />

correction of presbyopia. In particular, this thesis has focused on<br />

better underst<strong>and</strong>ing corneal laser ablation mechanisms (<strong>and</strong> the<br />

changes induced on the cornea) <strong>and</strong> contact lens fitting of contact<br />

lenses. We have studied the changes induced in the geometry of the<br />

optical surfaces, <strong>and</strong> also the optical outcomes in terms of optical<br />

aberrations. We have demonstrated the use of in-vitro models for the<br />

isolated study of the effects of the ablation, the measurement of the<br />

back surface of the cornea, or the fitting of contact lenses, both for<br />

validation of the measurement techniques <strong>and</strong> as tools to predict<br />

(<strong>and</strong> correct) the outcomes without the biological variability present<br />

in real eyes. Measurements on real patients have allowed us to<br />

assess the influence of biomechanical processes, <strong>and</strong> of the<br />

individual ocular properties in the optical/visual outcomes of<br />

refractive surgery (for myopia correction) <strong>and</strong> contact lenses (for<br />

myopia <strong>and</strong> presbyopia correction).<br />

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