Skip to content
How It Works
Explore
Ask a Question Resources Pricing
Who It's For
Patients
Decode results, prep for appointments, weigh options.
Caregivers & advocates
Carry the research load for someone you love.
Providers & clinicians
Resources for patients in your practice.
Log In Sign Up
PubMed This is a summary of 17 peer-reviewed journal articles Updated
Ophthalmology

Symptoms & Warning Signs

At a Glance

Birdshot chorioretinopathy can cause floaters, flashing lights, night blindness, blind spots, hazy vision, and faded colors, even when central eye-chart vision stays good. Sudden or worsening vision changes need same-day advice from an eye professional.

Because Birdshot Chorioretinopathy (BSCR) is a chronic condition, your visual symptoms may change over months or years. Understanding what these symptoms feel like—and which ones require immediate action—is key to managing your health. Many patients find that while their “sharp” central vision remains good, their “functional” vision (how they see in the real world) feels significantly altered [1][2].

Common Visual Symptoms

The symptoms of Birdshot are often bilateral (affecting both eyes), though one eye may feel worse than the other at different times [3].

  • Blurred or Hazy Vision: You may feel like you are looking through a light fog or a “dirty window” [4]. This haziness often comes from vitritis—inflammatory cells floating in the gel-like substance (vitreous) inside your eye [5].
  • Floaters: These look like small spots, strands, or “cobwebs” that drift across your field of vision [4]. They are caused by clumps of inflammatory cells or debris within the vitreous [6].
  • Photopsias (Flashing Lights): Many patients describe these as “shimmering,” “sparkling,” or “flickering” lights [4]. They are typically caused by inflammation irritating the retina or choroid [7].
  • Nyctalopia (Night Blindness): This is one of the most common early signs. You may find it increasingly difficult to see in dim light, such as in a movie theater or while driving at night [4][2]. If night vision, peripheral vision, or glare makes driving unsafe, do not drive, and consult your doctor and local licensing authority.
  • Paracentral Scotomas (Blind Spots): These are small “missing” or distorted patches in your vision [4]. These spots may be subtle and occur just off to the side of where you are looking, making it harder to read or recognize faces [8][9].
  • Washed-out Colors: You might notice that colors appear less vibrant or that it is harder to distinguish between similar shades [10].

Symptom Variability and Progression

It is normal for Birdshot symptoms to fluctuate slightly. However, symptoms alone are not a dependable measure of how active the inflammation is. You should not assume that a worsening symptom is “just a normal Birdshot flare.” A persistent or worsening change always needs to be evaluated by your care team, because it is impossible to distinguish a routine flare from a serious complication (like a retinal tear) based on symptoms alone [11].

Because your central vision (reading the eye chart) can remain stable even while your side vision or night vision declines, your doctor will use specialized tests like Visual Fields and ERGs to track these changes [12][13].

RED FLAGS: When to Seek Urgent Care

Do not wait for your next scheduled appointment if your vision changes suddenly. Any new or clearly worsening flashes, floaters, blind spots, or vision loss warrants prompt same-day advice from your eye team or an emergency eye service [14][15].

Contact your uveitis specialist immediately or go to an eye emergency room if you experience:

  • A “Curtain” or “Shadow”: A dark area that starts in your side vision and moves toward the center, which could indicate a retinal detachment [14].
  • A Sudden Increase in Floaters: An abrupt, massive increase in floaters or flashes [16].
  • Sudden Central Vision Loss: A dramatic drop in your ability to see what is directly in front of you over a few hours or days [9].
  • A Dense, New Blind Spot: A specific area of vision that was clear yesterday but is now completely missing or severely distorted [17].
  • Severe Eye Pain or Redness: While Birdshot itself is usually painless, sudden pain or deep redness can be a sign of a secondary complication or a severe infection mimicking Birdshot [14].

Common questions in this guide

What vision changes can Birdshot chorioretinopathy cause?
Birdshot chorioretinopathy can cause hazy or blurred vision, floaters, shimmering or flashing lights, difficulty seeing in dim light, small blind spots, and colors that look less vivid. It often affects both eyes, although one eye may be worse at a given time. Central sharp vision can stay good even as night or peripheral vision changes.
Are new floaters and flashes always just a Birdshot flare?
No. Symptoms can fluctuate, but symptoms alone cannot show how active inflammation is or distinguish a flare from a retinal tear or another complication. New or clearly worsening floaters, flashes, blind spots, or vision loss should receive same-day advice from your eye team or an emergency eye service.
When should I seek urgent care for Birdshot symptoms?
Seek immediate eye care for a curtain or shadow in your side vision, a sudden large increase in floaters or flashes, sudden central vision loss, or a dense new blind spot. Severe eye pain or deep redness also needs urgent assessment because Birdshot is usually painless and these signs may indicate another complication or infection.
Can Birdshot affect night driving even if my eye-chart vision is stable?
Yes. Night blindness, reduced peripheral vision, and glare can make driving unsafe even when central vision on an eye chart remains good. Do not drive if you cannot see safely in dim conditions, and discuss the change with your doctor and local licensing authority.
How do doctors monitor vision changes from Birdshot?
Eye teams may use visual-field testing and electroretinograms (ERGs) to measure changes in side vision and how the retina responds, because an eye chart may not show every problem. Your specialist may also assess for complications such as swelling in the macula or optic nerve.

Questions For You

Answer a question to get research tailored to you. Your answers are private.

Get notified when new evidence is published on Birdshot chorioretinopathy.

We monitor PubMed for new peer-reviewed studies on this topic and email a short summary when something meaningful changes.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.How do my current visual field and ERG results correlate with the blind spots or night vision issues I am experiencing?
  2. 2.If I notice a new blind spot or shimmering lights, how quickly should I contact your office for a review?
  3. 3.Can you help me understand the after-hours emergency plan if I experience a sudden change in my vision?
  4. 4.Given my symptoms, are we monitoring specifically for macular edema or optic nerve swelling?

References

References (17)
  1. 1

    EVALUATION OF PHOTORECEPTORS, RETINAL CAPILLARY PLEXUSES, AND CHORIOCAPILLARIS IN PATIENTS WITH BIRDSHOT CHORIORETINOPATHY.

    Forte R, Saleh M, Aptel F, Chiquet C

    Retina (Philadelphia, Pa.) 2020; (40(5)):977-988 doi:10.1097/IAE.0000000000002457.

    PMID: 30789462
  2. 2

    Visual acuity and visual field as a function of disease duration in patients with birdshot chorioretinitis.

    Loeliger J, Monnet D, Thorne J, et al.

    The British journal of ophthalmology 2024; (108(11)):1543-1547 doi:10.1136/bjo-2023-324636.

    PMID: 38508674
  3. 3

    Birdshot chorioretinopathy in an HLA-A29 positive Asian patient.

    Regenold J, Ghoraba H, Akhavanrezayat A, et al.

    American journal of ophthalmology case reports 2023; (29()):101802 doi:10.1016/j.ajoc.2023.101802.

    PMID: 36741421
  4. 4

    Birdshot retinochoroidopathy.

    Vitale AT

    Journal of ophthalmic & vision research 2014; (9(3)):350-61 doi:10.4103/2008-322X.143376.

    PMID: 25667738
  5. 5

    Birdshot Chorioretinopathy in a Patient on Tocilizumab for the Treatment of Giant Cell Arteritis.

    Pasol J, Roth EB, Albini TA

    Case reports in ophthalmological medicine 2025; (2025()):4861600 doi:10.1155/crop/4861600.

    PMID: 41114054
  6. 6

    Birdshot Chorioretinopathy in Early Adulthood: Review of Current Literature and Case Report.

    Pham BH, Uludag G, Hien DL, et al.

    International medical case reports journal 2023; (16()):815-831 doi:10.2147/IMCRJ.S430981.

    PMID: 38107027
  7. 7

    Guidelines From the French-Speaking Society for Histocompatibility and Immunogenetics (SFHI) for Harmonisation of HLA Genotyping in Autoimmune Diseases, Drug Hypersensitivity and Pharmacogenetics.

    Renac V, Moalic V, Dautin G, et al.

    HLA 2025; (106(4)):e70442 doi:10.1111/tan.70442.

    PMID: 41137743
  8. 8

    [Anatomic-functional correlations in birdshot chorioretinopathy: An observational single-center prospective study].

    Servant M, Couret C, Lebreton O, et al.

    Journal francais d'ophtalmologie 2021; (44(5)):632-642 doi:10.1016/j.jfo.2020.07.028.

    PMID: 33840496
  9. 9

    Acute macular neuroretinopathy in a patient with birdshot chorioretinopathy after intravitreal triamcinolone suspension injection.

    Maleki A, Fernandez CC, Philip AM, et al.

    European journal of ophthalmology 2023; (33(5)):NP35-NP40 doi:10.1177/11206721221124653.

    PMID: 36062613
  10. 10

    Multifocal electroretinogram in birdshot chorioretinopathy.

    Chiquet C, Berthemy-Pellet S, Altayrac-Bethenod J, et al.

    Retina (Philadelphia, Pa.) 2015; (35(6)):1256-65 doi:10.1097/IAE.0000000000000437.

    PMID: 25635576
  11. 11

    BIRDSHOT CHORIORETINITIS LESIONS ON INDOCYANINE GREEN ANGIOGRAPHY AS AN INDICATOR OF DISEASE ACTIVITY.

    Cao JH, Silpa-Archa S, Freitas-Neto CA, Foster CS

    Retina (Philadelphia, Pa.) 2016; (36(9)):1751-7 doi:10.1097/IAE.0000000000000967.

    PMID: 26977742
  12. 12

    Pointwise linear regression analysis of serial Humphrey visual fields and a correlation with electroretinography in birdshot chorioretinopathy.

    Arya B, Westcott M, Robson AG, et al.

    The British journal of ophthalmology 2015; (99(7)):973-8 doi:10.1136/bjophthalmol-2014-306003.

    PMID: 25637598
  13. 13

    Five-Year Trends in Multifocal Electroretinogram for Patients With Birdshot Chorioretinopathy.

    Mailhac A, Labarere J, Aptel F, et al.

    American journal of ophthalmology 2019; (200()):138-149 doi:10.1016/j.ajo.2018.11.022.

    PMID: 30557530
  14. 14

    A Case of Birdshot Chorioretinopathy following Varicella Zoster Virus-Induced Progressive Retinal Necrosis in the Contralateral Eye.

    Fukushima A, Nagasawa T, Tabuchi H

    Case reports in ophthalmology 2022; (13(2)):393-397 doi:10.1159/000524991.

    PMID: 35811771
  15. 15

    Retinal vasculitis in HLA-A29 birdshot retinochoroiditis, particularities and imaging narrative of an under-estimated and diagnostic component of the disease.

    Galand J, Papasavvas I, Herbort CP

    Journal of ophthalmic inflammation and infection 2024; (14(1)):31 doi:10.1186/s12348-024-00406-0.

    PMID: 38980473
  16. 16

    Atypical Unilateral Birdshot Chorioretinitis in a Hispanic Female.

    Marrero VM, Durán DJ, Fernández-Santos CC, et al.

    Puerto Rico health sciences journal 2023; (42(2)):180-182.

    PMID: 37352543
  17. 17

    PARACENTRAL ACUTE MIDDLE MACULOPATHY IN BIRDSHOT CHORIORETINOPATHY: A NOVEL ASSOCIATION.

    Carey A, Cohen S

    Retinal cases & brief reports 2016; (10(2)):151-3 doi:10.1097/ICB.0000000000000212.

    PMID: 26421963

This page is for informational purposes only and does not constitute medical advice about Birdshot chorioretinopathy. Sudden or worsening vision changes require prompt advice from your eye-care team or an emergency eye service.