Characterization and Causative Factors of Negative Dysphotopsia

Defining and Quantifying Negative Dysphotopsia Characterization and Causative Factors of Negative Dysphotopsia

Status

UNKNOWN

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT04224129

Acronym

NDys

Enrollment

Registered

2020-01-13

Start date

2016-01-31

Completion date

2021-05-31

Last updated

2020-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Pseudoaphakia

Brief summary

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.

Interventions

None listed

Study design

Observational model

COHORT

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

21 Years to No maximum

Healthy volunteers

Inclusion criteria

* Pseudophakic * Recurrently and persistently reporting about negative dysphotopsia * Age 21 and older * written informed consent prior to entering the study

Exclusion criteria

* Relevant ophthalmic diseases such as: glaucoma, (previous) traumatic cataract, corneal scars, age-related macular degeneration and other pathologies resulting in visual field defects * Pregnancy

Design outcomes

Primary

Measure	Time frame	Description
Identification of factors or a combination thereof that may cause negative dysphotopsia	2 hours	Biometry, Anamnesis, visual field, psychological questionnaires, wavefront aberrometry will be used to analyse if a factor causative for negative dysphotopsia can be detected

Secondary

Measure	Time frame	Description
Method to standardize characterization of negative dysphotopsia	20 minutes	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
Correlation between eye biometry, patient complaints and psychophysics	30 minutes	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

Countries

Austria

Contacts

Primary ContactOliver Findl, MD, Prof.

office@viros.at004319102157564

Outcome results