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Numbing Options for Eye Injections: What to Know Before Your Visit
How the Methods Compare
When patients ask which numbing method is better, the honest answer is that the research does not clearly favor one over the other for pain relief. Where the methods do differ is in side effects, procedure time, and depth of numbing.
In randomized trials, combined pain scores for numbing plus injection ranged from roughly 3.5 to 4.4 on a 10-point scale, and the differences between methods were not statistically significant. One study found that proparacaine drops scored 3.5 out of 10, while a subconjunctival shot scored 3.8, a difference well within the range of chance. Another crossover trial of 60 patients found that adding a numbing-soaked pledget on top of drops did not reduce pain compared with a dummy pledget. These results suggest that deeper numbing does not reliably translate into less remembered pain.
The most notable difference between methods is not pain but rather a cosmetic side effect linked to the numbing shot. A subconjunctival injection can leave a bright red patch on the white of the eye, similar in appearance to a bruise, which typically fades over one to two weeks. In one study, 9 out of 28 eyes given a subconjunctival numbing shot developed this red patch, while none of the eyes given topical numbing did. The patch is not painful or dangerous, but it is worth knowing about before you choose this option or explain your appearance to others afterward.
Topical numbing with drops or gel is the starting point for most patients. It adds the least time to a visit, involves no extra needle, and leaves no visible red patch. A subconjunctival shot is more likely to be considered when a previous injection caused genuine discomfort beyond the expected mild sting, when an eye is difficult to keep still, or when the procedure itself is more involved. Because neither method is clearly superior on pain, a conversation with your retina specialist about your specific experience is the most useful guide.
How Much the Injection Actually Hurts
Many patients expect the worst and are relieved to find the experience less intense than feared. Setting a realistic expectation ahead of time helps more than general reassurance.
Reported pain scores across clinical trials of topical numbing ranged from roughly 1 to 45 on a 100-point scale, placing the experience firmly in the mild range. On a simpler 0 to 10 scale, scores clustered between about 1.4 and 4.4. Most patients describe the sensation as pressure and a brief sting rather than sharp pain. A meaningful number feel almost nothing at all. If your experience was significantly worse than that description, it is worth reporting directly to your care team rather than assuming it is unavoidable.
The numbing method is only one piece of what determines comfort during an injection. Needle size plays a role: one study found that a thinner 30-gauge needle caused less pain than a thicker 26-gauge needle. Post-injection soreness can also come from the antiseptic used to clean the eye, the dilating drops, or the numbing agent itself irritating the surface, separate from the needle. If your eye stings for several hours after the visit, the drops used during the procedure are a likely contributor, and your care team can adjust them.
This is a common and reasonable question, especially for patients who need injections on an ongoing basis. The published research is genuinely split on this point. One study found pain scores decreasing with each consecutive injection, while a second study did not confirm that pattern. Some patients settle into the routine and find later injections less uncomfortable. Others do not notice much change. Neither experience signals that something has gone wrong. If your injections have not become easier over time, bring that up at your next visit rather than simply accepting it.
What to Expect After Your Injection
Knowing what is normal in the hours after an injection helps you distinguish ordinary recovery from something that needs attention. Most post-injection symptoms are mild and short-lived.
Once the numbing wears off, which often happens during the drive home, it is common for the eye to feel gritty or scratchy for a few hours. The eye may water, appear pink, and your vision may be blurry for the rest of the day. These effects come largely from the antiseptic used to clean the eye before the injection, as well as the drops used during the visit. Preservative-free artificial tears help ease the scratchy feeling, and avoiding rubbing protects the surface while it recovers. Plan to have a ride home for your first injection until you know how your eye responds.
If you received a subconjunctival numbing injection, a bright red area on the white of the eye is a common and expected side effect. It is caused by a small amount of bleeding beneath the clear membrane covering the eye, similar to a bruise under the skin. It looks more alarming than it is, does not cause pain, and fades on its own over one to two weeks. No treatment is needed.
The most serious risk associated with any eye injection is infection inside the eye, a condition called endophthalmitis. This risk belongs to the injection itself rather than to the numbing method chosen. Pooled data from large studies found this complication followed roughly 6 out of every 10,000 injections, which is uncommon but not impossible. Antibiotic drops before or after injections are not recommended because the evidence has not shown they lower this risk. The antiseptic cleaning step performed immediately before the injection is what reduces infection risk, which is why it is the final step before the needle.
When to Contact Us After an Injection
Most patients recover uneventfully, but certain changes in your eye after an injection should prompt a same-day call to your care team rather than waiting for your next scheduled visit.
Contact your retina specialist the same day if you notice any of the following in the days after an injection.
- Pain that gets worse rather than better, especially after the first day
- A drop in vision beyond the expected blurriness right after the injection
- Increasing redness, light sensitivity, or discharge from the eye
- A sudden increase in floaters, flashing lights, or a shadow across your field of vision
These are the signs that your care team will want to evaluate promptly rather than at your next routine appointment. Most patients who call turn out to have ordinary post-injection soreness. That is a reassuring outcome, and it is never a wasted call.
A gritty or scratchy feeling for several hours is expected. Mild aching, a pink appearance, watering, and hazy vision through the rest of the day are all common and generally resolve on their own. The pattern that separates ordinary recovery from something worth reporting is direction: normal soreness improves each day, while a developing problem gets worse rather than better. If you are unsure which category describes what you are feeling, call and describe it.
If a previous injection was more uncomfortable than you expected, the most useful thing you can do is mention it at the start of your next visit, before the drops go in. Tell your retina specialist where it hurt, at what point during the procedure, and how intense it felt. Your care team can allow more time for the numbing to take effect, add a pledget or a subconjunctival shot, choose a smaller needle size, or apply extra drops after the antiseptic. Adjusting the approach for a specific patient's experience is a normal part of care, not an unusual request.
Frequently Asked Questions
These questions address practical decisions and situations that go beyond the general explanations above.
Most patients feel pressure rather than a sharp sensation, and the injection itself takes only a few seconds. Your eyelids are typically held open with a small clip during the procedure, which many patients find stranger than the injection itself. Looking away from the injection site gives you something to focus on and keeps the eye still. If the lid clip is a source of discomfort for you, mention that to your retina specialist before the next visit.
It produces a deeper and more defined area of numbness, but that difference has not translated into meaningfully less pain in clinical studies. The distinction matters because deeper numbing and less remembered pain are not the same thing. If you are considering a subconjunctival shot specifically because you expect it to be noticeably more effective, that expectation may not be met, and the trade-off of a visible red patch and an extra needle is worth factoring into that decision.
For many patients, the antiseptic cleaning step rather than the needle itself is the sharpest moment. The antiseptic must be applied immediately before the injection to be effective, so it cannot simply be moved earlier in the sequence to give it time to settle. If the antiseptic sting has been a significant part of your discomfort, let your care team know. Additional numbing drops applied after the antiseptic and before the needle is placed can help reduce that sensation.
There is no known effect of numbing choice on the injected medicine itself. The numbing agents work on the surface and surrounding tissue, while the medicine delivered by injection acts inside the eye. These are separate processes that do not interact in a way that changes treatment effectiveness. How well your injection therapy works depends on your underlying condition, your response to the medication, and your schedule of treatments as recommended by your retina specialist.
Yes, and this is worth asking for directly when you schedule. Anxiety about the injection is different from pain during it, and the approaches that help are different as well. A longer appointment slot allows more time for the numbing to take effect and gives you a chance to settle before the procedure begins. Letting the scheduling team know that you would benefit from extra time is a reasonable request that many patients make.
Not necessarily, and a difficult first injection is not a sign that anything went wrong. The first procedure carries the additional weight of anticipation and unfamiliarity with the antiseptic, the lid clip, and the timing of each step. Some patients find that later injections feel progressively easier as the routine becomes familiar. Others do not notice much change. The most useful next step is to describe specifically what was worst to your retina specialist so the approach can be adjusted, whether that means a different numbing method, more time before the injection, or a smaller needle.
Visit Atlantic Retina Center for Expert Retinal Care
Our fellowship-trained, board-certified retina specialists provide the full range of vitreoretinal care to patients across the Eastern Shore of Maryland and central and southern Delaware. We take the time to discuss your comfort preferences before every injection and make adjustments based on your individual experience. If you have questions about your upcoming procedure or would like to schedule a visit with Atlantic Retina Center, we are here to help.