A scleral buckle is a piece of silicone rubber or sponge that a surgeon sutures to the white outer wall of the eye to push it inward, closing a retinal tear and allowing a detached retina to settle back into place. The procedure has been around since the late 1940s and remains one of the most reliable ways to reattach a retina, even as newer techniques like vitrectomy have become widespread. Understanding what the buckle does, when surgeons prefer it over alternatives, and what to expect afterward can help you make sense of a diagnosis that often arrives as an emergency.
How the Procedure Works
Retinal detachment happens when the thin layer of nerve tissue lining the back of the eye peels away from the tissue underneath it. Fluid seeps through a tear or hole in the retina and collects beneath it, lifting it off. Without treatment, the retina loses its blood supply and the affected area goes permanently blind. A scleral buckle tackles this problem from the outside. The surgeon identifies where the retinal break is, then stitches a silicone element onto the sclera (the tough white shell of the eye) at the corresponding spot. That element pushes the wall of the eye inward toward the detached retina, closing the break and relieving the traction that pulled the retina loose in the first place.1PubMed Central. Scleral Buckling: A Review of Clinical Aspects and Current Concepts
To create a permanent seal around the retinal break, the surgeon also applies either freezing treatment (cryopexy) or laser energy to the area. This controlled damage triggers a scar that bonds the retina to the tissue beneath it, much like spot-welding two sheets of metal. Once the break is sealed and the buckle is holding the wall in place, the fluid trapped under the retina gradually absorbs on its own over days to weeks. How quickly that fluid disappears depends on factors like the patient’s age, where the retinal breaks are located, and how well blood flows through the tiny vessels behind the retina.2PubMed Central. Multifactor analysis of delayed absorption of subretinal fluid after scleral buckling surgery Detachments that have been present for a long time, especially those involving previous failed repair attempts or bleeding beneath the retina, tend to absorb fluid more slowly.3PubMed Central. Delayed absorption of subretinal fluid after scleral buckling procedures: the significance of subretinal precipitates
When Surgeons Choose a Scleral Buckle
Scleral buckling tends to shine in younger patients whose natural lens is still clear. In these cases, a multicenter study comparing scleral buckling with vitrectomy found that primary reattachment rates were similar (about 92% for the buckle versus 94% for vitrectomy), but eyes treated with the buckle ended up with better final vision and lower rates of cataract formation.4PubMed Central. Scleral Buckling: A Review of Clinical Aspects and Current Concepts – Section: Clinical Indications That cataract advantage matters because vitrectomy involves removing the gel inside the eye, and that removal speeds up lens clouding, sometimes within months. A younger person facing decades of future vision has a lot to gain from avoiding that cascade.
The buckle also remains a go-to choice for detachments caused by a single identifiable retinal break, especially when the break sits in the lower half of the eye where gravity helps fluid drain away from the retina after surgery. It is less ideal when the retina has many tears scattered across multiple areas, when scar tissue has already formed on the retinal surface (a complication called proliferative vitreoretinopathy), or when the view into the eye is too poor for the surgeon to locate the breaks from the outside.
Scleral Buckle Compared to Vitrectomy
Vitrectomy, where the surgeon goes inside the eye, removes the vitreous gel, and repairs the retina from within, has become the dominant retinal detachment surgery in most practices. A Cochrane review pooling data from nine randomized trials and over 1,200 participants found little meaningful difference between the two approaches in primary reattachment rate, final reattachment rate, or visual acuity gain.5PubMed Central. Pars plana vitrectomy versus scleral buckling for repairing simple rhegmatogenous retinal detachments On the whole, the evidence suggests neither procedure is clearly superior for straightforward retinal detachments. The choice often comes down to the specifics of the case and the surgeon’s experience.
Where the buckle may have an edge is in chronic detachments. A study comparing the two procedures in eyes with longer-standing retinal detachments found that scleral buckling had a better single-surgery success rate than vitrectomy, and fewer eyes in the buckle group needed a second operation (about 22% versus 39%).6PubMed Central. Scleral Buckle versus Pars Plana Vitrectomy in the Management of Primary Chronic Rhegmatogenous Retinal Detachment In younger eyes without a posterior vitreous detachment, one study found that scleral buckling produced better long-term visual acuity than vitrectomy, even though both procedures ultimately reattached the retina at similar rates.7Scientific Reports. Vitrectomy versus scleral buckle for retinal detachment without posterior vitreous detachment
Sometimes surgeons combine both procedures, adding a scleral buckle during a vitrectomy for extra support. In eyes that have already had cataract surgery, a study comparing combined vitrectomy-plus-buckle against vitrectomy alone found no clear benefit from adding the buckle. The single-surgery success rate was actually slightly lower in the combined group, and complications were more frequent.8PubMed. Pseudophakic rhegmatogenous retinal detachment: combined pars plana vitrectomy and scleral buckle versus pars plana vitrectomy alone This underscores that more surgery is not always better surgery.
Scleral Buckle Compared to Pneumatic Retinopexy
Pneumatic retinopexy is the least invasive option for retinal detachment repair. The surgeon injects a gas bubble into the eye in the office, then uses cryopexy or laser to seal the tear while the bubble holds the retina in place. It is appealing because it avoids the operating room, but it has a significantly lower first-try success rate. One randomized trial found single-procedure reattachment in 84% of buckle eyes versus 62% of pneumatic retinopexy eyes, meaning nearly four in ten patients who had the gas-bubble procedure needed a second operation.9PubMed. Comparison of pneumatic retinopexy and scleral buckling in the management of primary rhegmatogenous retinal detachment Another study reported an even wider gap, with a 95.5% single-surgery success rate for the buckle and 67% for pneumatic retinopexy.10PubMed Central. Comparison of pneumatic retinopexy and scleral buckle for primary rhegmatogenous retinal detachment repair
After additional surgeries, both approaches eventually reattach the retina in nearly all cases. But visual outcomes diverge: patients whose pneumatic retinopexy failed tended to end up with worse final vision than those whose initial buckle succeeded. A systematic overview of the comparison concluded that the buckle likely produces better anatomical results and fewer recurrences, though pneumatic retinopexy carries a lower risk of side effects from the surgery itself.11Medwave. Scleral buckle versus pneumatic retinopexy for rhegmatogenous retinal detachments Pneumatic retinopexy works best for simple detachments with a single break in the upper part of the eye. For anything more complex, the buckle or vitrectomy is usually the safer bet.
Cryopexy Versus Laser for Sealing the Tear
During scleral buckling, the surgeon needs to create a permanent adhesion around the retinal break. The traditional approach is cryopexy, where a freezing probe is pressed against the outside of the eye to scar the tissue around the tear. The alternative is laser photocoagulation, typically performed a few weeks after surgery once the retina is lying flat again. Both methods work, but they are not identical in how the eye responds.
Cryopexy causes more inflammation inside the eye. One study measuring the breakdown of the eye’s internal barrier found significantly higher inflammation markers at every time point in patients who received cryopexy compared to those who received laser, and visual recovery was slower in the cryopexy group.12American Journal of Ophthalmology. Influence of Retinopexy on the Breakdown of the Blood-Ocular Barrier and Visual Recovery After Scleral Buckling Surgery A randomized trial comparing the two directly during scleral buckle surgery confirmed that laser offered faster visual recovery with fewer postoperative complications, though it requires a second visit and costs more.13PubMed. Cryotherapy vs laser photocoagulation in scleral buckle surgery: A randomized clinical trial Laser also carries a practical limitation: it needs a reasonably clear view of the retina to be applied, which is not always possible immediately after surgery. A separate randomized trial using a different laser wavelength also confirmed that laser-based sealing was safe and effective during the surgery itself.14PubMed. A randomized prospective study of rhegmatogenous retinal detachment cases treated with cryopexy versus frequency-doubled Nd:YAG laser-retinopexy during episcleral surgery
In practice, cryopexy remains more widely used during scleral buckling because it can be applied from the outside of the eye at the same time the buckle is placed, making the whole procedure a single operation. When a surgeon opts for laser instead, the trade-off is less inflammation but the inconvenience and cost of a return visit.
Segmental Buckles Versus Encircling Bands
The buckle element itself can be placed in two basic ways. A segmental buckle covers just the area around the retinal break. An encircling band wraps all the way around the eye like a belt, supporting the entire circumference. The encircling approach is sometimes preferred when there are multiple breaks or when the surgeon wants to reduce traction around the whole eye, but it comes with trade-offs.
Encircling bands have been linked to reduced blood flow behind the retina and even visual field loss. Segmental buckles avoid that problem and involve less tissue manipulation, which is one reason they have become more popular in recent years. The downside of a segmental buckle is that it tends to cause more optical distortion, producing higher-order aberrations that can persist longer than those caused by an encircling band.15PubMed Central. Anatomical and Visual Outcomes of Three Different Scleral Buckling Techniques These aberrations can make images appear smeared or haloed, though they typically improve over months.
Common Complications
The most predictable side effect of a scleral buckle is a change in your glasses prescription. By pushing the wall of the eye inward, the buckle increases the eye’s overall length, which shifts your vision toward nearsightedness. An older study found that encircling buckles increased axial length by about 1 mm on average, inducing roughly 2.75 diopters of myopia.16PubMed. Refractive changes after scleral buckling surgery A more recent prospective study confirmed a myopic shift of about 1 diopter at one year, with more extensive buckles and cryopexy each independently linked to a larger shift.17PubMed. A Prospective Study of Biometric Stability After Scleral Buckling Surgery These measurements generally stabilized within the first three months, meaning your prescription should settle down relatively early in recovery.
Double vision is another recognized complication. The buckle element sits under the muscles that move the eye, and it can mechanically restrict movement or irritate the muscle, causing misalignment. One study of 344 patients found that about 14% had misaligned eyes six weeks after surgery, with horizontal deviation being the most common pattern. Repeat buckling surgery roughly tripled that risk, and implants placed beneath the muscle (as opposed to explants sitting on the surface) were associated with higher rates of misalignment.18PubMed. Strabismus Following Scleral Buckling Surgery Most cases of post-buckle double vision resolve on their own or with prism glasses; only a small fraction require surgery to correct.
Infection and buckle exposure are uncommon but serious. Over a six-year period at one institution, 45 out of roughly 3,000 scleral buckle procedures resulted in the buckle eroding through the overlying tissue, and about three-quarters of those exposed buckles grew bacteria on culture, most commonly a type of skin staphylococcus.19Ophthalmic Surgery, Lasers and Imaging Retina. Scleral Buckle Removal Following Retinal Reattachment Surgery: Clinical and Microbiologic Aspects Buckle exposure can happen months or even years after surgery and usually requires removal of the buckle element. An 11-year analysis found that soaking silicone sponge implants in antibiotic solution before placement appeared to prevent extrusion entirely in the studied cases.20PubMed. Extrusion and infection incidence in scleral buckling surgery with the use of silicone sponge: to soak or not to soak?
Elevated eye pressure is a less common but important concern. In rare cases, the buckle can compress veins that drain fluid from the eye, raising pressure inside it. One case report described irreversible pressure elevation caused by a now-discontinued hydrogel buckle material (MIRAgel) that swelled over time and compressed the drainage pathway.21American Journal of Ophthalmology Case Reports. Irreversible intraocular pressure elevation as a complication of MIRAgel scleral buckling Modern silicone buckles do not have this swelling problem, but the MIRAgel story is a useful reminder that buckle materials matter and have evolved considerably over the decades.
Sickle Cell Disease and Anterior Segment Ischemia
People with sickle cell hemoglobin C disease face a uniquely dangerous complication from scleral buckling. The buckle can compress blood vessels that feed the front of the eye, and in patients whose red blood cells are already prone to clogging small vessels, this can trigger severe ischemia of the eye’s anterior segment. A study of sickle cell-hemoglobin C patients found that 71% of buckled eyes developed anterior segment ischemia, compared to just 3% of eyes in patients without sickle cell trait.22American journal of ophthalmology. Anterior segment ischemia following scleral buckling in sickle cell hemoglobinopathy Four of the ten eyes in that series shrank and effectively died. In some cases, the ischemia was mistaken for an infection, delaying appropriate treatment. This risk makes scleral buckling a procedure that demands special caution or alternative surgical planning in patients with sickle cell disease.
Anterior segment ischemia can also occur in patients without sickle cell disease, though far less commonly. A recent case report described a 55-year-old patient who developed corneal swelling, inflammation, and a poorly reactive pupil two days after an encircling buckle procedure, along with ischemic damage to the optic nerve.23PubMed Central. Anterior segment ischemia and ischemic optic neuropathy following encircling scleral buckling surgery and air tamponade Encircling bands, which compress more of the eye’s circumference, carry a higher risk of this complication than segmental buckles.
Recovery and Long-Term Vision
Vision after scleral buckling does not snap back immediately. If the macula (the central part of the retina responsible for sharp, detailed vision) was detached before surgery, recovery is slower and the final outcome is less predictable. But studies consistently show that vision can keep improving for months and sometimes years after a successful buckle.
Two separate studies found that younger age, lower degrees of existing myopia, and a macular detachment lasting fewer than 30 days were the strongest predictors of good long-term visual recovery.24PubMed. Long-term visual recovery after scleral buckling procedure of rhegmatogenous retinal detachment involving the macula25PubMed. Long-term visual recovery after scleral buckling for macula-off retinal detachments The practical takeaway is that getting to surgery quickly, ideally within a few weeks of the macula coming off, meaningfully improves your chances of regaining reading-level vision.
One reassuring finding involves persistent fluid under the retina after surgery. It is common to see a thin layer of subretinal fluid on imaging even after a buckle has successfully closed the retinal tear, and patients sometimes worry when their surgeon mentions it. A study specifically examining this found no significant difference in final visual acuity between eyes that cleared the fluid quickly and those that took longer.26PubMed. Influence of persistent submacular fluid on visual outcome after successful scleral buckle surgery for macula-off retinal detachment In other words, residual fluid under the retina after a buckle does not necessarily mean a worse visual result.
Scleral Buckling in Children
Retinal detachment in children is uncommon but often more complicated than in adults. Kids tend to have more advanced detachments at presentation, partly because a child may not notice or report vision loss in one eye. Scleral buckling remains the primary procedure for many pediatric cases. A study of 104 pediatric eyes found a 73% single-operation success rate, with an overall final reattachment rate of 94% after additional surgeries when needed.27PubMed. Primary Scleral Buckling for Pediatric Rhegmatogenous Retinal Detachment Factors that predicted a higher failure risk included multiple retinal breaks, detachments covering three or more quadrants of the eye, and the presence of Stickler syndrome, a connective tissue disorder that predisposes to retinal detachment at a young age.
In premature infants with retinal detachments related to retinopathy of prematurity, the picture is more sobering. A systematic review found that reattachment rates varied wildly across studies, from under 1% to 90%, and that even successful anatomical reattachment did not reliably translate into functional vision.28Advances in Neonatal Care. A Systematic Review of Anatomical and Visual Function Outcomes in Preterm Infants After Scleral Buckle and Vitrectomy for Retinal Detachment The best outcomes occurred when surgery was performed between two and nine months of age. These cases are among the most challenging in all of ophthalmology, and the decision to operate involves difficult conversations about realistic expectations.
Chandelier-Assisted Scleral Buckling
Traditional scleral buckling requires the surgeon to look into the eye through an indirect ophthalmoscope, a headset-mounted device that provides a wide but somewhat awkward view. The surgeon has to hold a lens in one hand, the cryoprobe or other instrument in the other, and somehow also manage the buckle elements. It is a technically demanding juggling act, and the ergonomics are part of why fewer surgeons-in-training learn the procedure today compared to decades past.
A newer approach uses a small chandelier light inserted into the eye, allowing the surgeon to view the retina through a wide-angle lens under the operating microscope instead of wearing the indirect ophthalmoscope. This provides better visualization of the peripheral retina, where most retinal breaks occur, and improves the surgeon’s working posture.29PubMed Central. Scleral Buckling with Chandelier Illumination The main advantages include easier and more standardized surgery with improved ergonomics.30PubMed Central. Chandelier-Assisted Scleral Buckling: A Literature Review Some proponents believe this innovation could help keep scleral buckling alive as a technique by lowering the learning curve for younger surgeons who are otherwise gravitating toward vitrectomy for nearly every case. Whether this actually reverses the trend remains to be seen, but the improved visualization is a genuine step forward for a procedure whose basic concept has not fundamentally changed in over 70 years.
Anesthesia and What to Expect on Surgery Day
Scleral buckling involves pulling on the muscles that move the eye, which can be painful and trigger nausea. For this reason, it is more commonly performed under general anesthesia than many other eye surgeries, though local or regional anesthesia with sedation is also an option. The surgery typically takes one to two hours, depending on the complexity of the detachment. You go home the same day in most cases, often with a patch and shield over the eye.
Recovery positioning after a buckle is generally less restrictive than after vitrectomy with gas tamponade, where patients sometimes need to keep their head face-down for days. After a buckle alone, you may be told to avoid heavy lifting and strenuous activity for a few weeks, but strict positioning is usually not required. Follow-up visits in the first week and month are important to check that the retina is lying flat, that eye pressure is normal, and that the buckle element is not causing any immediate complications. Vision in the operated eye is blurry at first, often much blurrier than before surgery, and it can take weeks to months to know how much acuity will return. Patience during this period is genuinely important, since studies confirm that improvement can continue well beyond the first few months.