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PubMed This is a summary of 16 peer-reviewed journal articles Updated
Ophthalmology · Neovascular age-related macular degeneration

Injections: What to Expect and Safety Red Flags

At a Glance

After a wet AMD eye injection, mild grittiness, a red spot, brief blur, or a few temporary floaters can be normal. New or worsening pain, redness, light sensitivity, reduced vision, many floaters, flashes, or a curtain-like shadow require same-day eye care.

Receiving an injection into the eye is a prospect that causes anxiety for many, but the procedure itself is typically over in seconds and is designed with your safety as the absolute priority. By knowing exactly what to expect—and which symptoms are genuinely urgent—you can navigate your treatment with confidence and peace of mind.

The Injection Process: Step-by-Step

The entire procedure is focused on antisepsis (preventing infection) and comfort. While every clinic has its own flow, the standard steps include:

  1. Numbing: Your eye will be numbed using drops, a gel, or a small local anesthetic injection. You should feel pressure during the procedure, but not sharp pain [1].
  2. Cleaning: The most important step is cleaning the eye and eyelids with povidone-iodine (a yellow-brown antiseptic). This significantly reduces the risk of bacteria entering the eye [1][2].
  3. Lid Control: A small tool called a speculum may be used to keep your eye open and prevent your eyelashes from touching the injection site [1].
  4. The Injection: You will be asked to look in a specific direction while the doctor quickly injects the medication through the pars plana—a safe “entry zone” in the white of the eye that avoids the lens and the center of the retina [1].
  5. Post-Check: The doctor may check your vision or eye pressure immediately afterward to ensure everything is stable [3].

Aftercare: Do not rub your eye. Follow your clinic’s instructions precisely regarding the use of drops and restrictions on bathing, swimming, or tap-water exposure.

What is Normal (The “Green Lights”)

Most patients experience minor, harmless side effects. These are not emergencies:

  • Subconjunctival Hemorrhage: A bright red “blood spot” on the white of your eye. It looks dramatic, like a bruise, but it does not affect your vision. It commonly takes about 1 to 2 weeks (and sometimes longer) to fade [4][5].
  • Grittiness: A “sandy” or foreign-body sensation often caused by the antiseptic soap or the numbing drops drying the surface of the eye [6].
  • Transient Floaters: You may see “bubbles” or small dark spots moving in your vision immediately after the injection; these are usually just the medication or tiny air bubbles that will disappear within a day [7].
  • Pressure Blur: Your vision may be dim or blurry for about 30 minutes as your eye pressure stabilizes [3][8].

Emergency Red Flags: When to Call Immediately

While serious complications are rare—occurring in fewer than 1 in 2,000 injections—they require same-day medical evaluation to save your sight [9][10]. Do not wait for a specific day or a visible hypopyon to call. Absence of a visible hypopyon does not exclude infection.

1. Endophthalmitis and Severe Inflammation

Infection or sterile inflammation can present over a variable period (early or later).

  • The Red Flags: New or worsening eye pain (not just grittiness), worsening redness, light sensitivity, and a sudden or persistent drop in vision [11][12][13].
  • Do not try to treat severe pain yourself with over-the-counter drops.

2. Retinal Detachment

This occurs if the injection causes a tear in the retina. It can happen within days or up to a few weeks later [14].

  • The Red Flags: A sudden “shower” of many new floaters, bright flashes of light, or a dark “curtain” or shadow moving across your side vision [15][16].

Rule of Thumb: If you experience the symptom pattern of new/worsening pain, redness, light sensitivity, or reduced vision, contact your retina specialist’s emergency line, urgent eye service, or emergency department immediately [11]. Never “wait and see” with these symptoms.

Common questions in this guide

What should I expect during a wet AMD eye injection?
The eye is numbed, cleaned with an antiseptic, and held open if needed. The medicine is injected quickly through the white part of the eye, so you may feel pressure but should not feel sharp pain. Your clinician may check your vision or eye pressure afterward.
What symptoms are normal after a wet AMD injection?
Mild grittiness, a red spot on the white of the eye, a few bubbles or floaters, and brief blurry or dim vision can occur. The red spot may take one to two weeks or longer to fade, while small bubbles or floaters usually clear within a day. These symptoms are generally not emergencies if they are mild and improving.
When should I call urgently after an eye injection?
Call your retina specialist, urgent eye service, or emergency department the same day for new or worsening pain, increasing redness, light sensitivity, or a sudden or persistent drop in vision. Do not wait for a visible spot in the front of the eye or try to treat severe pain with over-the-counter drops.
What are the warning signs of retinal detachment after an injection?
A sudden shower of many new floaters, flashes of light, or a dark curtain or shadow moving across your side vision can signal retinal detachment. Seek immediate eye care if any of these occur, even if the injection was several days or weeks ago.
How can I lower infection risk after my eye injection?
Do not rub your eye, and follow your clinic's instructions about drops and keeping the eye clean. Avoid swimming and getting tap water in the eye for the period your clinic recommends, often 24 to 48 hours.
Can I drive myself home after a wet AMD injection?
Your vision may be blurry or your eye may be patched briefly after treatment, so arrange a driver if possible. Ask your clinic when it is safe for you to drive, especially if your vision remains blurred.

Get notified when new evidence is published on wet macular degeneration.

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References

References (16)
  1. 1

    Endophthalmitis following intravitreal anti-vascular endothelial growth factor (VEGF) injection: a comprehensive review.

    Merani R, Hunyor AP

    International journal of retina and vitreous 2015; (1()):9 doi:10.1186/s40942-015-0010-y.

    PMID: 27847602
  2. 2

    Preventive factors, diagnosis, and management of injection-related endophthalmitis: a literature review.

    Singh R, Davoudi S, Ness S

    Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie 2022; (260(8)):2399-2416 doi:10.1007/s00417-022-05607-8.

    PMID: 35278125
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    Transient vision and intraocular pressure changes following anti-vascular endothelial growth factor injection.

    Abbas K, Basilious A, Duncan J, et al.

    Canadian journal of ophthalmology. Journal canadien d'ophtalmologie 2026; (61(2)):412-421 doi:10.1016/j.jcjo.2025.09.005.

    PMID: 40987347
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    Oxymetazoline: reduction of subconjunctival hemorrhage incidence after intravitreal injections.

    Gonzalez-Saldivar G, Pita-Ortiz IY, Flores-Villalobos EO, et al.

    Canadian journal of ophthalmology. Journal canadien d'ophtalmologie 2019; (54(4)):513-516 doi:10.1016/j.jcjo.2018.09.006.

    PMID: 31358153
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    Pain control and subconjunctival haemorrhage after intravitreal injection using cooled anaesthetic eyedrops and antiseptics: A prospective, double-blind, randomized controlled trial.

    Moshkovsky R, Golan N, Aviel Gadot E, et al.

    Acta ophthalmologica 2024; (102(4)):e587-e594 doi:10.1111/aos.15798.

    PMID: 37853924
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    [Quality of life survey of 3,738 patients treated with intravitreal injections for age-related macular degeneration].

    Uzzan J, Haddad M, Salamé N

    Journal francais d'ophtalmologie 2024; (47(3)):104075 doi:10.1016/j.jfo.2024.104075.

    PMID: 38368762
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    Systemic and ocular complications related to intravitreal administration of anti-VEGF agents.

    Koksaldi S, Kayabasi M, Karti O, Saatci AO

    Medical hypothesis, discovery & innovation ophthalmology journal 2026; (15(1)):40-68 doi:10.51329/mehdiophthal1539.

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    Clinical Features Associated with Acute Elevated Intraocular Pressure After Intravitreal Anti-VEGF Injections.

    LoBue SA, Gindina S, Saba NJ, et al.

    Clinical ophthalmology (Auckland, N.Z.) 2023; (17()):1683-1690 doi:10.2147/OPTH.S414212.

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    Intraocular inflammation following intravitreal injections of anti-vascular endothelial growth factor drugs.

    Ferreira AM, Mendes AF, Beato JN, et al.

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    PMID: 40522452
  10. 10

    Incidence and clinical features of post-injection endophthalmitis according to diagnosis.

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    Endophthalmitis after Intravitreal Injection of Vascular Endothelial Growth Factor Inhibitors: Management and Visual Outcomes.

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    RAHNELLA AQUATILIS ENDOPHTHALMITIS AFTER INTRAVITREAL INJECTION IN AN IMMUNOCOMPETENT PATIENT.

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    Mechanisms of sterile inflammation after intravitreal injection of antiangiogenic drugs: a narrative review.

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    Rhegmatogenous Retinal Detachment after Intravitreal Injection.

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  15. 15

    Fungal Necrotizing Scleritis After Intravitreal Injection Therapy.

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This page explains what to expect from wet AMD eye injections and which symptoms need urgent care for informational purposes only; it does not constitute medical advice. Contact your retina specialist or an emergency eye service about concerning symptoms after an injection.

Guide contents wet macular degeneration
Research & Literature
04 Treating Wet AMD 06 Staying on Track