Findings from a recent study published in Diagnostics found that surgical timing and a patient's baseline vision predicted visual recovery after rhegmatogenous retinal detachment (RRD) repair better than the structural characteristics of the detachment itself.
The takeaway for clinicians: How fast a patient reaches the operating room may matter more than what the retina looks like once they get there.
Give me some background first.
Some context: RRD is a surgical emergency during which the neurosensory retina separates from the retinal pigment epithelium (RPE) through one or more breaks.
- Without timely repair, vision is lost. While the annual incidence sits around 13 per 100,000 people in Europe, that number is far more common in the United States: an estimated 1 in 10,000 people
Pars plana vitrectomy (PPV) is the preferred procedure for complex and pseudophakic detachments, as it reattaches the retina in the large majority of eyes.
… so what’s the issue?
Anatomical success and visual success aren't the same thing.
Plenty of eyes get the retina back in place but never recover the vision the patient hoped for—which is why predicting functional outcome matters for counseling before surgery.
Now, talk about the study.
Researchers of a retrospective study at a single hospital in Cluj-Napoca, Romania, reviewed eyes operated on for primary RRD between January 2021 and December 2024. One experienced retinal surgeon performed every procedure.
The question: Which preoperative patient and detachment factors actually predict best corrected visual acuity (BCVA) 6 months after PPV?
The authors used a robust linear regression model rather than standard linear regression, since the best-corrected visual acuity (BCVA) data violated normality and variance assumptions.
Let’s discuss these participants.
The analysis covered 136 eyes from 135 patients (one man had bilateral detachment, so each eye was counted separately). Inclusion required primary RRD in adults 18 or older.
Eyes were excluded for:
- Previous retinal detachment
- Tractional or exudative detachment
- Ocular trauma or other ocular and retinal comorbidities
Demographics: Mean age was 64.6 years, 54.4% of eyes were from female patients, and 64% of patients lived in urban areas. The macula was off in 81.6% of eyes, and 73.5% were phakic at presentation.
Timeline and vision: Symptom duration from onset to surgery averaged 12.88 days but ranged widely, from 2 to 94. Preoperative BCVA was 1.52 logMAR, improving to 0.74 logMAR at 6 months.
Surgery: All eyes underwent 3-port, 23-gauge PPV with cryopexy and silicone oil tamponade. Primary anatomical success was achieved in 123 eyes; 13 needed a second surgery for redetachment, and all eyes were reattached by six months.
- 21 patients had cataract surgery with intraocular lens (IOL) implantation during follow-up
Findings?
Across the cohort, BCVA improved from 1.52 to 0.74 logMAR (20/660 to 20/110 Snellen) at 6 months. In the full multivariate model, three factors independently predicted final vision: symptom duration, baseline BCVA, and phacoemulsification during follow-up.
Timing mattered most. Each additional day from symptom onset to surgery added roughly 0.01 logMAR of worse vision at 6 months in the univariate model (p < 0.001), and symptom duration held its significance in the full model.
- Patients who presented within the first 0 to 3 days ended up with better acuity than those who waited more than 15 days
And how did baseline vision factor into patients’ final vision?
It actually predicted final vision. Each one-point increase in admission logMAR predicted a 0.172 higher (worse) logMAR at 6 months (p < 0.001).
- Patients who walked in seeing better walked out seeing better
The cataract surgery signal: Eyes that underwent phacoemulsification during the 6-month follow-up finished with better acuity than those that didn't (0.571 versus 0.776 logMAR; coefficient −0.194, p = 0.016).
So what didn’t predict the outcome?
Age, gender, residence, lens status, proliferative vitreoretinopathy (PVR), number of retinal tears, lattice degeneration, diabetes, and extent of detachment all failed to reach independent significance.
Any surprising findings?
The macula twist: Macula-on eyes had far better baseline vision than macula-off eyes (0.416 versus 1.773 logMAR, p < 0.001), and macular status was a significant predictor on univariate analysis (p = 0.01). However, it dropped out of the multivariate model once symptom duration and baseline BCVA were accounted for (p = 0.278).
- The authors flagged this as paradoxical and pinned it on retrospective misclassification: no preoperative optical coherence tomography (OCT) was done, shallow foveal involvement can be missed clinically, and very recent macula-off cases may have been graded as macula-on.
A hypertension surprise: Patients with systemic hypertension showed slightly better 6-month vision in the univariate model (lower logMAR by about 0.135, p = 0.036), a finding that lost significance in the full model (p = 0.092).
- The authors speculated that ACE inhibitors, the main antihypertensive used in their patients, may offer some retinal protection through the local renin-angiotensin system.
Any limitations?
This was a single-center, retrospective series with all surgeries done by one surgeon, so the usual caveats around generalizability apply.
The bigger gap: No routine preoperative OCT was performed, so the team had no OCT biomarkers and likely misclassified some macular statuses, which weakens any conclusion that macular status doesn't affect outcome.
- There was no control group, and small subgroups limited several analyse
- Only three eyes had PVR grade B, for example, so the model couldn't confirm PVR as a negative prognostic factor—despite strong prior evidence that it is
- Patients' medication histories before symptom onset weren't captured either
Next up: the experts’ opinion.
The authors argued that functional outcome depends on a combination of temporal and structural factors rather than any single predictor, and that surgical timing and symptom duration may carry more weight than macular status alone.
They framed early diagnosis and prompt surgery as the most actionable levers for protecting vision.
Anything else?
One finding worth a second look: The link between phacoemulsification during follow-up and better vision. Cataract development is common after vitrectomy, and removing a clouding lens clears the visual axis, which may partly explain the gain.
- The authors stopped short of calling it causal and called for prospective work to sort it out.
So what’s next after this?
The team called for larger, prospective studies that include preoperative OCT imaging as well as detailed medication and history data, which would let future analyses capture the OCT-based macular detail this study couldn't.