An observational study in Pseudoaphakia, sponsored by Vienna Institute for Research in Ocular Surgery. Status unknown at 1 site in Austria. Open to participants aged 21 Years and older. Per ClinicalTrials.gov, last updated 2020-01-13.
Sponsored by Vienna Institute for Research in Ocular Surgery · Observational
The present study is designed as an exploratory study, seeking to investigate the correlation of patient complaints to subjective or objective measurement methods. Better understanding of causative factors of negative dysphotopsia will improve detection and maybe prediction of this optical phenomenon.
1,701 studies on the registry are indexed under Cataract; 230 are open to participants now.
This study's planned enrollment of 10 is below the median of 81 across 484 observational studies indexed under Cataract.
Browse Cataract studies →Vienna Institute for Research in Ocular Surgery is the lead sponsor of 64 studies on the registry; 8 are open to participants now.
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10 patients after cataract extraction, suffering from negative dysphotopsia
Exclusion Criteria:
Identification of factors or a combination thereof that may cause negative dysphotopsia
Biometry, Anamnesis, visual field, psychological questionnaires, wavefront aberrometry will be used to analyse if a factor causative for negative dysphotopsia can be detected
Time frame: 2 hours
Method to standardize characterization of negative dysphotopsia
New approaches like Goldmann visual field are used to try to picture negative dysphotopsias and patients will also be asked to draw the "dark shadows"
Time frame: 20 minutes
Correlation between eye biometry, patient complaints and psychophysics
Eye biometry will be measured using IOL Master 700, patient complaints will be asked during an patient-doctor interview, and psychophysics will be assessed using a psychological questionnaire
Time frame: 30 minutes
This study is status unknown, as verified in Jan 2020. You cannot join it, but the record below documents what was studied.
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Vienna Institute for Research in Ocular Surgery