The goal of this clinical trial is to observe the role of PRF in treating ophthalmic diseases.The efficacy and safety of PRF were validated for four ophthalmic conditions: macular hole, pterygium, corneal ulcer, and patients undergoing trabeculectomy for glaucoma. The main question aims to answer is PRF's effectiveness in ocular surface and fundus diseases. Participants will be divided into 2 groups, the experimental group will be treated with PRF and the control group will be treated with conventional surgery, with a 12-month postoperative follow-up to determine the role of PRF on wound healing in ophthalmic diseases.
Patients suffering from pterygium, macular hole, corneal ulcer, and glaucoma requiring for trabeculectomy , who visited Renmin Hospital of Whuhan University, were chosen to participate in this study. The participants were randomly divided into the experimental group (PRF group) and the control group (conventional group). The PRF group received PRF membrane treatment, while the conventional group received conventional surgical treatment. Before and after surgery, participants underwent a comprehensive ophthalmological exam at 1 week, 1 month, 3 months, 6 months, and 12 months. The outcome indicators are monitored and can vary depending on the disease. Participants with pterygium were examined for graft dissolution and complications. Participants with macular hole were monitored for hole closure, visual acuity recovery, and retinal blood flow recovery. Participants with corneal ulcer were monitored for lesion healing and complications such as degree of corneal vascularization and opacity. Participants with glaucoma were monitored for postoperative intraocular pressure (IOP), degree of conjunctival leakage in the filtration zone, and degree of scarring in the filtration zone.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
170
A specially formulated PRF membrane, as described previously, was filled into the macular hole to promote fissure repair.
The treatment of the macular hole was ILM peeling.
Used of autologous PRF membrane to cover the exposed conjunctiva after pterygium excision.
Used of autologous conjunctiva to cover exposed sclera after pterygium excision
Used of autologous PRF membranes to cover the exposed sclera after trabeculectomy for glaucoma.
Used of amniotic to cover the exposed sclera after trabeculectomy for glaucoma.
After surgical debridement of corneal ulcers, autologous PRF membrane was placed over the corneal wound to promote corneal healing
After surgical debridement of corneal ulcers, autologous amniotic membrane was placed over the corneal wound to promote corneal healing
Eye Center, Renmin Hospital of Wuhan University
Wuhan, Hubei, China
Whether the macular hole is closed in participants with macular hole(Unit: yes/no)
Using optical coherence tomography（OCT ）to see if the macular hole is healing to compare the healing rate between the PRF membrane filling group and the ILM peeling group.
Time frame: Pre-operation, and at 1 week, 1 month, 3 months, and 6 months post-operation.
Whether the wound heals completely after pterygium excision in participants with pterygium(Unit: yes/no)
Observation of the anterior segment of the eye using a slit lamp to determine whether the wound is healed after pterygium excision and to compare the healing rate between the PRF membrane-covered group and the autologous conjunctival-covered group.
Time frame: Pre-operation, and at 1 week, 1 month, 3 months, and 6 months post-operation.
IOP in participants undergoing trabeculectomy for glaucoma(Unit: mmHg)
Measurement of IOP using an IOP meter to compare the effect of IOP reduction in glaucoma treatment in the PRF membrane group and the amniotic membrane group.
Time frame: Pre-operation, and at 1 week, 1 month, 3 months, and 6 months post-operation.
Whether the corneal ulcer is healing in participants with corneal ulcer(Unit: yes/no)
The investigators use a slit lamp to examine the anterior segment of the eye to assess the corneal wound healing rate. The PRF membrane-covered group is compared to the control group.
Time frame: Pre-operation, and at 1 week, 1 month, 3 months, and 6 months post-operation.
Best-corrected visual acuity (BCVA) in participants with macular hole(Unit: logMAR)
Measurement of BCVA in participants with macular holes using an international standard logarithmic visual acuity chart.
Time frame: Pre-operation, and at 1 week, 1 month, 3 months, and 6 months post-operation.
Occurrence of complications in participants with pterygium(Unit: rate)
Using a slit lamp, visualizing the anterior eye segment to detect complications in participants with pterygium.
Time frame: Pre-operation, and at 1 week, 1 month, 3 months, and 6 months post-operation.
Degree of tissue scarification in participants undergoing trabeculectomy for glaucoma(Unit: mild, moderate, severe)
Viewing the anterior segment of the eye using a slit lamp to determine the extent of tissue scarring in participants undergoing trabeculectomy for glaucoma.
Time frame: Pre-operation, and at 1 week, 1 month, 3 months, and 6 months post-operation.
Occurrence of complications in participants with corneal ulcer(Unit: rate)
Using a slit lamp, visualizing the anterior eye segment to detect complications in participants with corneal ulcer.
Time frame: Pre-operation, and at 1 week, 1 month, 3 months, and 6 months post-operation.
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