Ana Cláudia Vieira's scientific contributions

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Publication (1)

FIG. 1. Distribution of the relative frequency (in percentage) of the Q...
FIG. 2. Representation of the anterior corneal asphericity distributed...
FIG. 3. Distribution of the corneal asphericity by the spherical...
FIG. 4. Histogram of the longitudinal Q value changes.
Age, Refractive, and Keratometric Data Obtained With the Data Obtained...
Age-Related Variations in Corneal Asphericity and Long-Term Changes
Article
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  • Aug 2018
Purpose: Corneal front-surface asphericity is directly related with the optical quality of the eye and with contact lenses fitting. The purpose of this study was to evaluate the corneal asphericity as a function of age, sex, and refractive error measured with autokeratometry and corneal topography and its long-term changes (5- to 10-year period)....
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Citations

... As in other studies, we observed that corneal spherical aberration varies greatly among individuals [10]. In both cases -refraction of the outer paraxial rays by far greater amount than central rays (positive spherical aberration) and refraction of the outer paraxial rays by a lesser amount than central rays (negative spherical aberration) -the end effect causes a longitudinal spread of focus. ...
Reference: Presbyopia Correction with a New Extended Depth of Focus Intraocular lens
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