Rhegmatogenous Retinal DetachmentSO/RRD/mfERGNCT07609628
Effect of Silicon Oil on Retinal Electrical Functions Using Multifocal Electroretinogram
A study testing Multi focal electroretinogram in people with Rhegmatogenous Retinal Detachment, run by Minia University at 1 site in Egypt.
Trial summary
Retinal detachment is one of the leading causes for permanent vision loss.Incidence of Rheugmatogenous Retinal Detachment (RRD) about 10.5 people per 100,000 population pars plana vitrectomy is the most popular and effective surgical options. Read more about this study
- Who is it for?
- Ages 18 to 70 years
- Conditions the study is for
- Rhegmatogenous Retinal Detachment
- What is being tested?
- Multi focal electroretinogram
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 50 participants
- Where
- 1 siteEgypt
- Study dates
- 1 Feb 2026to 1 Aug 2026
- Phase
- Interventional
- Are there results?
- Not yet: the study is under way
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 18 to 70 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Patients with primary rhegmatogenous retinal detachment
Who cannot join
- Patients with history of previous intraocular surgery.
- Patients with combined traction-rhegmatogenous retinal detachment
- Patients with ocular disease as glaucoma ,degenerative myopia,age related macular degeneration
- Patients with poor fixation.
- Uncooperative patients.
- Patients with retinopathy.
- emulsified SO or complicated SO removal were excluded from this study
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Amr Abdelrahman, professor contact
Egypt1 site, 1 recruiting
- Recruiting
Faculty of medicine
Minya, Minya Governorate, 61111
Amany Mohammed, MBBCH, +201151849593, drmonmonnady92@gmail.com
Amr A Abdelrahman, Lecturer, +201093292792
About this study
Official title: Effect of Silicon Oil on Retinal Electrical Functions in Patients With Rhegmatogenous Retinal Detatchment Using Multifocal Electroretinogram .
Retinal detachment is one of the leading causes for permanent vision loss.Incidence of Rheugmatogenous Retinal Detachment (RRD) about 10.5 people per 100,000 population pars plana vitrectomy is the most popular and effective surgical options.
Tamponade agents as silicone oils are used to restore intraocular volume and apply surface tension to the detached retinal surface Silicone oil (SO) is a liquid containing polymerized siloxane with organic side chains. It has a high thermal stability, is hydrophobic, and chemically inert. The use of silicone oils as intraocular tamponades dates from 1962.
Read the detailed description
Retinal detachment is one of the leading causes for permanent vision loss.Incidence of Rheugmatogenous Retinal Detachment (RRD) about 10.5 people per 100,000 population pars plana vitrectomy is the most popular and effective surgical options.
Today, implanting silicone oil as a long-term tamponade is widespread and accepted. However, the oil can emulsify at the interface with its hydrophilic intraocular environment. Eyes treated with silicone oil that emulsifies can show up to 72% long-term complications, including corneal decompensation, band keratopathy, chronic elevations of intraocular pressure, opacification of the crystalline lens, retinopathies, and optic neuropathy.
Silicone oil floats in the vitreous cavity because the specific gravity is 0.97; its bubbles' surface tension may change after injection into the eye. Higher viscosity silicone oils have less emulsification.
In the vitreous cavity, buoyancy and gravity operate on an intraocular tamponade agent that presses against the retina as a downward force. Moreover, interfacial tension is the interaction between two immiscible chemicals, such silicone oil and aqueous humor.silicone oils have viscosities ranging from one thousand (MW 37 kDa) to five thousand (MW 65 kDa).
Multifocal electroretinography (mfERG) is an investigation that can simultaneously measure multiple electroretinographic responses at different retinal locations. mfERG allows topographic mapping of retinal function in the central 40-50° of the retina. The strength of mfERG lies in its ability to provide objective assessment of the central retinal function at different retinal areas within a short duration of time.The mfERG is taken under conditions of light adaptation in order to obtain an electrophysiological response from the cones.
- Conditions
- Rhegmatogenous Retinal Detachment
- Being tested
- Multi focal electroretinogram
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Multi focal electroretinogramDevice
Also called Silicon oil tamponade, Viterectomy
to evaluat the effect of silicon oil on retinal function in the eyes that underwent Pars Plana Vitrectomy with Silicon oil tamponade for Rheugmatogenous Retinal Detachment. mfERG responses were recorded before and after Silicon oil removal .
| Study group | Role | What they receive |
|---|---|---|
| Effect of Silicon Oil on Retinal Functions after Viterectomy | Experimental | About the 50 patients suffering from Rhegmatogenous Retinal Detatchment. All participants will undergo Viterectomy then the Retinal Functions will be evaluated by using Silicon oil tamponade recorded by Multi focal electroretinogram before and after the operation. Receives: Device: Multi focal electroretinogram |
What is being measured
The primary outcome is the main question the study is designed to answer.
Retinal Functions after vitrectomy
Evaluation of the Function of the Eye Retina after Vitrectomy for all the participants
Measured: 1 Month to 3 Months
Electroretinogram Examination after vitrectomy
Electroretinogram examination which performed for all eyes after the vitrectomy as:When the light hits the eye, the photoreceptors (rods and cones) and other retinal cells generate small electrical impulses. The Electroretinogram captures and graphs these impulses to evaluate if these cells are functioning normally or not.
Measured: 1 Month to 3 Months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted27 May 2026
- Study start1 Feb 2026
- Primary completion15 Jul 2026 (estimated)
- Study completion1 Aug 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Rhegmatogenous Retinal DetachmentStudies of the same condition, open and under way.
- More trials run by Minia UniversityThe sponsor's other registered studies.
- 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
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Diagnosis
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 50 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Minia University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Amany Nady Mohammed, Minia University
- Investigators
- Mahmoud Mohammed M. Genedy, Professor, Study chair, Department of Ophthalmology, fuculty of medicine,Minia University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07609628
- Sponsor's protocol ID
- Rhegmatogenous Retinal Detatch
- Acronym
- SO/RRD/mfERG
- Status last verified
- Jan 2026
- First submitted
- 12 Jan 2026
- Last updated
- 27 May 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 27 May 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effect of Silicon Oil on Retinal Electrical Functions in Patients With Rhegmatogenous Retinal Detatchment Using Multifocal Electroretinogram .
- ClinicalTrials.gov ID
- NCT07609628
- Acronym / sponsor ID
- SO/RRD/mfERG / Rhegmatogenous Retinal Detatch
- Conditions
- Rhegmatogenous Retinal Detachment
- Study type
- Interventional
- Recruitment status
- Recruiting
- Enrolment
- 50 participants (estimated)
- Lead sponsor
- Minia UniversityUniversity, hospital or other
- Study start
- 1 Feb 2026 (actual)
- Primary completion
- 15 Jul 2026 (estimated)
- Study completion
- 1 Aug 2026 (estimated)
- First posted
- 27 May 2026 (actual)
- 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.
Retinal detachment is one of the leading causes for permanent vision loss.Incidence of Rheugmatogenous Retinal Detachment (RRD) about 10.5 people per 100,000 population pars plana vitrectomy is the most popular and effective surgical options.
Tamponade agents as silicone oils are used to restore intraocular volume and apply surface tension to the detached retinal surface Silicone oil (SO) is a liquid containing polymerized siloxane with organic side chains. It has a high thermal stability, is hydrophobic, and chemically inert. The use of silicone oils as intraocular tamponades dates from 1962.
Detailed description
Retinal detachment is one of the leading causes for permanent vision loss.Incidence of Rheugmatogenous Retinal Detachment (RRD) about 10.5 people per 100,000 population pars plana vitrectomy is the most popular and effective surgical options.
Today, implanting silicone oil as a long-term tamponade is widespread and accepted. However, the oil can emulsify at the interface with its hydrophilic intraocular environment. Eyes treated with silicone oil that emulsifies can show up to 72% long-term complications, including corneal decompensation, band keratopathy, chronic elevations of intraocular pressure, opacification of the crystalline lens, retinopathies, and optic neuropathy.
Silicone oil floats in the vitreous cavity because the specific gravity is 0.97; its bubbles' surface tension may change after injection into the eye. Higher viscosity silicone oils have less emulsification.
In the vitreous cavity, buoyancy and gravity operate on an intraocular tamponade agent that presses against the retina as a downward force. Moreover, interfacial tension is the interaction between two immiscible chemicals, such silicone oil and aqueous humor.silicone oils have viscosities ranging from one thousand (MW 37 kDa) to five thousand (MW 65 kDa).
Multifocal electroretinography (mfERG) is an investigation that can simultaneously measure multiple electroretinographic responses at different retinal locations. mfERG allows topographic mapping of retinal function in the central 40-50° of the retina. The strength of mfERG lies in its ability to provide objective assessment of the central retinal function at different retinal areas within a short duration of time.The mfERG is taken under conditions of light adaptation in order to obtain an electrophysiological response from the cones.
Study design
- Primary purpose
- Diagnosis
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Effect of Silicon Oil on Retinal Functions after Viterectomy | Experimental | Device: Multi focal electroretinogramAbout the 50 patients suffering from Rhegmatogenous Retinal Detatchment. All participants will undergo Viterectomy then the Retinal Functions will be evaluated by using Silicon oil tamponade recorded by Multi focal electroretinogram before and after the operation. |
Who may qualify
- Ages
- 18 to 70 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- Patients with primary rhegmatogenous retinal detachment
Key exclusion criteria (7 listed)
- Patients with history of previous intraocular surgery.
- Patients with combined traction-rhegmatogenous retinal detachment
- Patients with ocular disease as glaucoma ,degenerative myopia,age related macular degeneration
- Patients with poor fixation.
- Uncooperative patients.
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 |
|---|---|---|
| Multi focal electroretinogramAlso: Silicon oil tamponade, Viterectomyto evaluat the effect of silicon oil on retinal function in the eyes that underwent Pars Plana Vitrectomy with Silicon oil tamponade for Rheugmatogenous Retinal Detachment. mfERG responses were recorded before and after Silicon oil removal . | Device | Effect of Silicon Oil on Retinal Functions after Viterectomy |
Primary outcome
Retinal Functions after vitrectomy
Time frame: 1 Month to 3 Months
Evaluation of the Function of the Eye Retina after Vitrectomy for all the participants
Electroretinogram Examination after vitrectomy
Time frame: 1 Month to 3 Months
Electroretinogram examination which performed for all eyes after the vitrectomy as:When the light hits the eye, the photoreceptors (rods and cones) and other retinal cells generate small electrical impulses. The Electroretinogram captures and graphs these impulses to evaluate if these cells are functioning normally or not.
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 27 May 2026.
- Individual participant dataSharing planned: No
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Treatment of Retinal Detachment in People Who Have Not Had Cataract Surgery With Vitrectomy vs Vitrectomy and Cataract Removal
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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.
Amr Abdelrahman, professor contact
Mahmoud Mohammed M. Genedy, Professor study chair
Department of Ophthalmology, fuculty of medicine,Minia University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Multi focal electroretinogram in people with Rhegmatogenous Retinal Detachment, run by Minia University at 1 site in Egypt.
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 7 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: looking for participants now, as of the sponsor's last update on 27 May 2026. 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 Egypt. 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?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Amany Nady Mohammed Mohammed, Resident (+201151849593, drmonmonnady92@gmail.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Retinal Functions after vitrectomy (time frame: 1 Month to 3 Months). The study lists 2 primary outcomes in all. 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 27 May 2026.