PresbyopiaNCT03024073
Assessment of Near Vision Capacity in Different Light Intensities
An observational study of Presbyopia, run by Democritus University of Thrace at 1 site in Greece.
Trial summary
Patients who underwent presbyopic correction with bilateral bifocal intraocular lenses implantation are supposed to have sufficient uncorrected vision capacity for activities of daily living (ADLs) that require near vision acuity (NV), (ie. book reading). Read more about this study
- Who is it for?
- Ages 45 to 65 years
- Conditions the study is for
- Presbyopia
- What is being tested?
- BB-Phaco
- Type of treatment
- Surgery or procedure
- How many people
- 50 participants
- Where
- 1 siteGreece
- Study dates
- Jan 2017to Jun 2018
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 45 to 65 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: Presbyopic patients that underwent pseudophakic presbyopic correction with bilateral bifocal intraocular lenses implantation
Who may be able to join
- Presbyopia
Who cannot join
- Glaucoma
- Corneal pathology
- Fundus pathology
- Severe neurological/mental diseases that interfere with visual acuity
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Assessment of Near Vision Capacity in Different Light Intensities and Temperatures in Patients Who Underwent Pseudophakic Presbyopic Correction
Patients who underwent presbyopic correction with bilateral bifocal intraocular lenses implantation are supposed to have sufficient uncorrected vision capacity for activities of daily living (ADLs) that require near vision acuity (NV), (ie. book reading). However, it is known that light intensity and temperature has a great impact on near vision capacity. Primary objective of this study is to identify the optimal task lighting conditions (in terms of light intensity and temperature) for ADLs that demand near vision acuity for a sample oa patients who underwent presbyopic correction with bilateral bifocal intraocular lenses implantation
- Conditions
- Presbyopia
- Being tested
- BB-Phaco
- Medical subject headings
- Presbyopia
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
BB-PhacoProcedure or surgery
Phacoemulsification with bilateral bifocal lenses implantation
| Study group | Role | What they receive |
|---|---|---|
| SG | Study group (patients who underwent pseudophakic presbyopic correction with bilateral bifocal lenses implantation Receives: Procedure: BB-Phaco | |
| CG | Control group (age-matched participants without pseudophakic presbyopic correction) |
What is being measured
The primary outcome is the main question the study is designed to answer.
Uncorrected Near Vision Acuity (UnVA)
Near Vision Acuity
Measured: 6 months
Secondary outcomes (1)
Near Vision Capacity (NVC)
NVC score will be measured by the performance score in the following ADLs: a) cellular phone directory entry search, b) reading of message in a cellular phone, c) reading a medical prescription, d) reading a public phonebook
Measured: 6 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted18 Jan 2017 (estimated)
- Study startJan 2017
- Primary completionApr 2018
- Study completionJun 2018
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for PresbyopiaStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 50 participants (actual)
Sponsor and investigators
- Lead sponsor
- Democritus University of Thrace
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Georgios Labiris, Democritus University of Thrace
- Investigators
- Georgios Labiris, MD, PhD, Principal investigator, Democritus University of Thrace
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03024073
- Sponsor's protocol ID
- 300/13-1/2017
- Status last verified
- Jul 2019
- First submitted
- 14 Jan 2017
- Last updated
- 25 Jul 2019
- Results posted
- No
- Data monitoring committee
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 25 Jul 2019. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Assessment of Near Vision Capacity in Different Light Intensities and Temperatures in Patients Who Underwent Pseudophakic Presbyopic Correction
- ClinicalTrials.gov ID
- NCT03024073
- Acronym / sponsor ID
- 300/13-1/2017
- Conditions
- Presbyopia
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 50 participants (actual)
- Lead sponsor
- Democritus University of ThraceUniversity, hospital or other
- Study start
- Jan 2017
- Primary completion
- Apr 2018 (actual)
- Study completion
- Jun 2018 (actual)
- First posted
- 18 Jan 2017 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Patients who underwent presbyopic correction with bilateral bifocal intraocular lenses implantation are supposed to have sufficient uncorrected vision capacity for activities of daily living (ADLs) that require near vision acuity (NV), (ie. book reading). However, it is known that light intensity and temperature has a great impact on near vision capacity. Primary objective of this study is to identify the optimal task lighting conditions (in terms of light intensity and temperature) for ADLs that demand near vision acuity for a sample oa patients who underwent presbyopic correction with bilateral bifocal intraocular lenses implantation
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| SG | – | Procedure: BB-PhacoStudy group (patients who underwent pseudophakic presbyopic correction with bilateral bifocal lenses implantation |
| CG | – | –Control group (age-matched participants without pseudophakic presbyopic correction) |
Who may qualify
- Ages
- 45 to 65 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- Presbyopic patients that underwent pseudophakic presbyopic correction with bilateral bifocal intraocular lenses implantation
Key inclusion criteria (1 listed)
- Presbyopia
Key exclusion criteria (4 listed)
- Glaucoma
- Corneal pathology
- Fundus pathology
- Severe neurological/mental diseases that interfere with visual acuity
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| BB-PhacoPhacoemulsification with bilateral bifocal lenses implantation | Procedure or surgery | SG |
Primary outcome
Uncorrected Near Vision Acuity (UnVA)
Time frame: 6 months
Near Vision Acuity
1 secondary outcome
Near Vision Capacity (NVC)
Time frame: 6 months
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 25 Jul 2019.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Georgios Labiris, MD, PhD principal investigator
Democritus University of Thrace
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Presbyopia, run by Democritus University of Thrace at 1 site in Greece.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 25 Jul 2019. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Greece. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Uncorrected Near Vision Acuity (UnVA) (time frame: 6 months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 25 Jul 2019; AzTrials last refreshed its copy on 7 Nov 2026.