The aging process of the lens is not the only cause of deterioration of vision.
Similar cases of poor visual acuity caused by the presence of a transparent but dysfunctional crystalline lens were presented by Steve Dewey in his presentation The ‘Dysfunctional’ Dysfunctional Lens Patient. In the summary of the article, the authors noted the presence of high order aberrations (HOA) from internal optics, including the crystalline lens, which were not compensated by the cornea, and pointed to this as the cause of poor visual acuity. described a case of an unclear reduction in the quality of vision in a patient without visible cataract or other ocular causes. mention, among others, the appearance of higher order aberration (HOA) and light scattering as the consequences of the aging process, and draw attention to the diversified influence of the opaque lens on the quality of vision. The main purpose of introducing this term was to better understand the relationship between changes in visual quality caused by the aging (clouding) lens. The term dysfunctional lens syndrome refers to changes that occur in the crystalline lens after the age of 40. Keywords: Lens Dysfunction, Itrace, Decreased Vision, Amblyopia
#Itrace writer verification
Thus, it is necessary to consider verification of the diagnosis made in some patients, pointing to a new disease entity, i.e.
The medical history in the study group may indicate a congenital nature of the abnormal structure of the lens. The procedure was performed on patients over 18 years of age. In most cases removing the dysfunctional lens and replacing it with an artificial lens allowed for a significant improvement in vision to far distances while maintaining proper vision to near distances. The more pathological the results of the visual contrast sensitivity and higher order aberration, the lower the values of visual acuity to far distances. Low values of visual contrast sensitivity and high values of higher order aberrations for the internal optics were observed, with the correct values for the cornea. The results of examinations in the field of Higher Order Aberration, Opacity Map, Modulation Transfer Function™ and their graphical presentation using the Dysfunctional Lens Index™ module were analysed.
The results of examinations using iTrace indicated the lens as the cause of visual impairment despite the apparent lack of opacity and other pathologies within it. The exclusion of causes related to the cornea and retina, optic nerve damage and the lack of visible pathologies of the lens in the physical examination did not allow for the determination of the cause of deterioration in visual acuity to far distances despite good vision to near distances. Visual impairment was observed regardless of patients’ age and type of eye defect diagnosed, with the majority of people suffering from myopia and accompanying astigmatism. The article analyses 22 cases of severe impairment of vision to far distances for no apparent reason.
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