Plain English Summary
Background and study aims
The aim of this study is to detect the changes in pupil size following cataract surgery.
Who can participate?
Adults aged 48 to 81 and undergoing cataract surgery.
What does the study involve?
All patients will receive the same type of intraocular lens. Measurements will be made five minutes after the operation and then one month after the operation.
What are the possible benefits and risks of participating?
The benefit is better visual acuity after the operation. The risk is complication after standard cataract surgery.
Where is the study run from?
Uskudar University, Istambul (Turkey).
When is study starting and how long is it expected to run for?
From December 2014 to February 2015
Who is funding the study?
Uskudar University and GMMA Haydarpasa Training Hospital
Who is the main contact?
Dr. Yildiray Yildirim
Changes in pupil size following phacoemulsification surgery: a prospective cohort study
The pupil size is important in appropriate cases in whom the combination with phacoemulsification and multifocal intra occular lenses (IOL) implantation would be performed. This is because postoperative visual disturbances may be directly related to the pupil size. Therefore, pupil size assessment of the patients who are to undergo implantation of a multifocal lens is important.
Clinical Research Ethics Committee of Haydarpasa Numune Training and Research Hospital, Istanbul. 22/12/2014, HNEAH-KAEK 2014/92
Prospective cohort study
Primary study design
Secondary study design
Patient information sheet
Not available in web format, please use the contact details below to request a patient information sheet
Changes in pupil size developing after phacoemulsification surgery
All patients will have phacoemulsification surgery and implantation of the same type of intraocular lens. Pupil measurements will be made after each patient waited in a dark room for 5 minutes preoperatively and will be repeated one month after the operation.
Primary outcome measure
Preoperative and postoperative pupil size changes
Secondary outcome measures
Overall trial start date
Overall trial end date
Reason abandoned (if study stopped)
Participant inclusion criteria
1- Male and female patients aged between 48 and 81
2- Patients with cataracts
Target number of participants
Participant exclusion criteria
1- Patients who have a history of ocular trauma, uveitis, optic neuropathy or anisocoria and also have other accompanying serious ocular diseases except cataract
2- Patients who have a complicated phacoemulsification surgery
Recruitment start date
Recruitment end date
Countries of recruitment
Trial participating centre
Trial participating centre
GMMA Haydarpasa Training Hospital
Altunizade District Haluk Turksoy Street. No:14
+90 216 400 22 22
Funding Body Type
Funding Body Subtype
Results and Publications
Publication and dissemination plan
Publication of study results in peer-reviewed journal in 2015.
Intention to publish date
Participant level data
Available on request
Basic results (scientific)