PhD Defence Natalia Y. Makhotkina

Keywords: Negatieve dysphotopsia, staaroperatie, kunstlens
 

"Negative dysphotopsia"

The research presented in this thesis explores negative dysphotopsia (ND), an optical phenomenon that occurs following uncomplicated cataract surgery. Patients experiencing ND report seeing a dark shadow or crescent that obscures their temporal visual field. Despite extensive study over the past twenty years, consensus on the underlying mechanisms and optimal treatment options remains uncertain. This thesis offers a literature review on the reported incidences of ND and reports the differences in complaint rates between passive and active registration methods.

To facilitate clinical evaluation of ND, a questionnaire was developed to conduct psychometric assessments, measuring its impact on vision quality. In addition, suggestions were made for employing visual field investigations to quantify ND severity and assess treatment efficacy. The effectiveness of treating ND through additional artificial lens implantation was discussed, with an evaluation of its possible treatment mechanisms through optical analysis based on patient-specific data.

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