What is light photosensitivity?

Light sensitivity or “photophobia” is common in people diagnosed with eye conditions or sight loss. Light sensitivity is where the light level in the environment is too bright and causes discomfort. For some people, this discomfort can be extreme and can further reduce their usable vision.

Are flowers photosensitive?

Many flowering plants (angiosperms) use a photoreceptor protein, such as phytochrome or cryptochrome, to sense seasonal changes in night length, or photoperiod, which they take as signals to flower.

What is the difference between photosensitivity and photophobia?

Photophobia literally means “fear of light.” It is used in medicine to mean an aversion to or avoidance of light, whether light is painful or not. Photosensitivity can mean any sort of reaction to light, but in medicine it is primarily used to mean skin reactions to light.

Which flower is more sensitive to the sunlight?

Chrysanthemums and poinsettias are day-length sensitive plants. This is called photoperiodism. They set their flower buds at night so they need more than 12 hours of darkness. Some plants are so sensitive to light that even a short blink of light will prevent them from setting buds.

Is there a medical reason for photophobia and light sensitivity?

But for others, photophobia can be a persistent symptom of a diagnosed medical condition such as migraine, post-concussion syndrome or dry eye. In this comprehensive guide, we take a close look at photophobia and light sensitivity as a medical symptom as well as identify known causes and treatments.

What is the meaning of the term photosensitivity?

Photosensitivity is the term used to describe sensitivity to the ultraviolet (UV) rays from sunlight and other light sources, such as indoor fluorescent light.

What are the physical symptoms of light sensitivity?

Some of the physical symptoms of light sensitivity include: 1 Eyestrain and squinting 2 Eye pain 3 Headache or migraine attack 4 Intolerance of light, especially fluorescents 5 Inflammation 6 Excessive blinking 7 Watery eyes 8 Vertigo or dizziness

What are the symptoms of photosensitivity in the face?

Actinic prurigo (hereditary PMLE) — Symptoms are similar to those of PMLE, but they usually are concentrated on the face, especially around the lips. Photoallergic eruption — This usually causes either an itchy red rash or tiny blisters. In some cases, the skin eruption also spreads to skin that was covered by clothing.