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Accessory Structures of the Eye01:17

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Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
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Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
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Open Angle Glaucoma: Treatment01:27

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In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
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At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
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Focusing of Light in the Eye01:16

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Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
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Ultrasound Cyclo Plasty in Eyes with Glaucoma
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Sunglasses for painful red eye.

Sean Keohane1, James Potts2, Mark Taubert3,4

  • 1Velindre Cancer Centre, Cardiff, UK.

BMJ Supportive & Palliative Care
|January 4, 2024
PubMed
Summary

A 62-year-old man developed herpes simplex viral keratitis after spinal radiotherapy. Prompt diagnosis and treatment with antivirals, corticosteroids, and supportive care resolved his painful red eye and photophobia.

Keywords:
Drug administrationHospital carePain

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Area of Science:

  • Ophthalmology
  • Oncology
  • Infectious Diseases

Background:

  • Spinal radiotherapy can be associated with various side effects.
  • Ocular complications following cancer treatment require careful multidisciplinary management.

Purpose of the Study:

  • To report a case of herpes simplex viral keratitis in a patient undergoing spinal radiotherapy.
  • To highlight the importance of interdisciplinary collaboration in diagnosing and managing ocular complications in oncology patients.

Main Methods:

  • A case report of a 62-year-old male patient.
  • Clinical assessment involving ophthalmology, oncology, and palliative care teams.
  • Treatment included topical and systemic antiviral medications, corticosteroids, and analgesics.

Main Results:

  • The patient presented with an acutely painful red eye and severe photophobia.
  • Diagnosis of herpes simplex viral keratitis was confirmed.
  • Treatment led to resolution of symptoms, with sunglasses providing symptomatic relief for photophobia.

Conclusions:

  • Herpes simplex viral keratitis is a potential complication in patients undergoing spinal radiotherapy.
  • Early recognition and prompt, multidisciplinary management are crucial for favorable outcomes.
  • Supportive measures like sunglasses can significantly improve patient comfort.