FND Education Project

REFERENCE · RECOVERY TECHNIQUE

Photophobia: An Agreed Light and Protection Plan

Most likely fit: Light sensitivity limits activities and specialist assessment supports considering a tolerable, individualized change alongside treatment of relevant causes. [Specialist clinical guidance; FND-specific exposure evidence is limited and there is no universal schedule]

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —

For the Person With FND

What this approach is for

Photophobia means light causes discomfort or pain; it does not mean you are afraid of light. It can accompany migraine, eye conditions and other disorders, with or without functional visual loss. First establish what needs treatment and what protection lets you function now.

If you and the clinician choose to try a change, start from an environment you can manage. The goal might be attending an appointment or reading briefly, not reaching someone else’s definition of normal lighting. Needed glasses, shading and environmental adaptations can remain available.

Terms in everyday language

Luminance concerns the light coming from a surface. Glare can make light uncomfortable or reduce useful vision. Dark adaptation is the visual system’s adjustment to dim conditions. This ordinary process may matter when planning changes, but it does not prove that a person caused their symptoms by using protection.

Practical discussion and flare adaptations

Discuss one change at a time: reducing glare from a window, changing the position of a lamp, or trying a slightly different light level for a short agreed task. A clinician may consider gradual changes to tint or time without tinted lenses, but these are choices to test, not conditions for receiving care.

Agree the stopping rule and an easier fallback before the trial. Review headache, eye pain and the later response. Do not stare into light sources, use flashing material or continue through severe symptoms. During a flare, return to tolerable protection and assistance; do not impose an exposure session at that moment.

These examples require selection for your assessed presentation. The clinical rationale and its limits are described in the sources below. (Sources: 1, 2, 3)

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —

For Family, Friends, and Other Supporters

Ask before altering lights, curtains or screens. Never remove sunglasses or insist that the person prove they can tolerate a brighter room. Keep appointment and transport settings accessible.

Help report both practical benefit and delayed worsening. Being unable to increase light tolerance is a reason to revise care, not evidence of avoidance, lack of effort or insufficient optimism.

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —

For Clinicians and the Care Team

Selection and assessment

Assess ocular surface disease, inflammation, migraine and other relevant causes of photophobia. Define whether the target is painful light sensitivity, visual loss, motion intolerance or a combination. Review lens purpose, glare, flicker and environmental barriers. FND does not establish a generic indication for exposure therapy.

Explicit procedure

  1. Clarify the causes already assessed and any new eye pain or visual change needing review.
  2. Identify one valued activity and preserve the protection required for safe access.
  3. Explain the proposed benefit and uncertainty of a graded change; obtain consent.
  4. Choose one adjustable feature and an initially tolerable task, without a fixed escalation timetable.
  5. Review immediate and delayed symptoms, activity achieved and recovery burden.
  6. Continue, modify or stop according to benefit and harm; coordinate treatment of migraine or eye disease and retain useful accommodations.

Review, progression and stopping

The 2024 specialist review advocates gradual reduction of dark adaptation and some sunglasses use. This collection presents that as a selected clinical approach, not a universal prescription or proof that protection perpetuates an individual’s FND. Severe or sustained deterioration calls for reassessment. New severe eye pain or sudden loss of vision requires urgent medical care rather than exposure practice.

This is an educational implementation example, not a validated standalone treatment protocol. (Sources: 1, 2, 3)

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —

Research and Sources

The functional-visual-loss review proposes graded light approaches from clinical experience. The broader photophobia review supports the need to consider ophthalmic and neurological causes; it is not an FND exposure trial. The exact light, tint and timing plan must be individualized, and the 2026 review does not establish a standard regimen.

Citation Full citation
[1] Ramsay N, McKee J, Al-Ani G, Stone J. How do I manage functional visual loss. Eye. 2024;38:2257–2266. FND-CIT-0024. Source
[2] Ramsay N, Tessmann H, McKee J, Ercoli T, Stone J. Functional visual loss: a systematic review and meta-analysis of epidemiology, prognosis and treatment. Eye. 2026;40:1784–1793. Published online June 26, 2026. FND-CIT-0103. Source
[3] Digre KB, Brennan KC. Shedding light on photophobia. Journal of Neuro-Ophthalmology. 2012;32(1):68–81. FND-CIT-0105. Source

Source check: September 16, 2026 · Ophthalmology, neuro-ophthalmology, orthoptics, migraine, psychological, lived-experience, supporter and accessibility review pending.

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
Research and Sources —