When a tumor grows larger with no preceding inflammation or if the first symptom is blindness followed by intense pain, we know it to be a tumor. A staphyloma of the cornea is a cicatrix made up of remains of corneal tissue, iris, and connective tissue, pouched out before intraocular pressure, traversed by large blood vessels from the conjunctiva. If recent, it has bluish color with gray and black spots; older ones are thicker, firmer, and grayer. Large staphylomas may overhang sclera. Rarely, an excrescence forms on its surface called a corneal horn. A total staphyloma involves the entire cornea, while partial affects only part of it near the margin.
Ulcers in infants are commonly caused by gonorrheal conjunctivitis, leading to simple or purulent ulcers that may perforate and cause complications like iris prolapse or anterior capsular cataract. Crescentic ulcers eat away corneal periphery, often hidden until central portion breaks down from lack of nutrition.
In childhood, phlyctenular keratitis causes intense photophobia, blepharospasm, and corneal lesions despite less serious underlying issues. Symptoms resemble scrofula or tuberculosis but no tubercle bacilli are found in ocular lesions.
Mooren’s ulcer appears as a superficial ulcer with undermined edge near upper limbus, recurs in adjacent clear cornea until entire surface is covered, rendering eye blind. Serpiginous ulcers start suddenly with pain and cedema of upper lid, marked ciliary injection, yellowish gray disklike ulcer with infiltrated margin, iritis, and hypopyon.
Treatment for serpiginous ulcers depends on virulence of microorganisms and tissue resistance; recovery may leave nearly transparent scar but usually leaves large dense white cicatrix. Other causes include diplobacillus, streptococcus, bacillus pyocyaneus, pneumobacillus, staphylococcus.
<Callout type="warning" title="Dangerous Complications">Corneal ulcers can lead to severe complications such as perforation, secondary glaucoma, and total destruction of the eye if not treated promptly.</Callout>
Traumatism may cause superficial or deep loss of substance in young patients leading to round purulent ulcer. In older patients, it often leads to serpiginous ulcers.
Ulcers due to fungi are rare but can set in with intense pain and constant increasing discomfort.
Key Takeaways
- Corneal staphylomas and ulcers require immediate medical attention to prevent severe complications such as perforation or total destruction of the eye.
- Phlyctenular keratitis in children can mimic symptoms of scrofula or tuberculosis but lacks evidence of tubercle bacilli.
- Serpiginous ulcers are more common in middle-aged and elderly individuals exposed to slight traumatisms, often caused by pneumococcus.
Practical Tips
- Early detection and treatment of corneal ulcers can prevent severe complications such as perforation or total destruction of the eye.
- In children with suspected phlyctenular keratitis, a thorough examination is necessary to rule out other conditions like scrofula or tuberculosis.
Warnings & Risks
- Corneal staphylomas and ulcers can lead to dangerous complications such as perforation, secondary glaucoma, and total destruction of the eye if not treated promptly.
- Serpiginous ulcers caused by pneumococcus require specific treatment different from other bacterial causes.
Modern Application
While this chapter focuses on diagnosing corneal diseases in a historical context, its principles remain relevant today. Early detection and prompt medical intervention are crucial to prevent severe complications such as perforation or total destruction of the eye.
Frequently Asked Questions
Q: What is the primary cause of corneal ulcers in infants?
The commonest cause of corneal ulcers in infants is gonorrheal conjunctivitis, which can lead to simple or purulent ulcers that may perforate and cause complications such as iris prolapse or anterior capsular cataract.
Q: What distinguishes serpiginous ulcers from other types of corneal ulcers?
Serpiginous ulcers are characterized by a sudden onset of pain, marked ciliary injection, and the presence of a yellowish gray disklike ulcer with an infiltrated margin, often accompanied by iritis and hypopyon. They typically start near the upper limbus and progress rapidly.
Q: What is phlyctenular keratitis?
Phlyctenular keratitis causes intense photophobia, blepharospasm, and corneal lesions in children despite less serious underlying issues. Symptoms resemble scrofula or tuberculosis but no tubercle bacilli are found in ocular lesions.