![](//s1.studylibfr.com/store/data-gzf/d560ca0292d35efee2228821027a511c/1/010129931.htmlex.zip/bg2.jpg)
CHapter 7
168 CMDT 2022
upper or lower lid with redness and swelling of the adjacent
conjunctiva. Initial treatment is with warm compresses. If reso-
lution has not occurred by 2–3 weeks, incision and curettage is
indicated. Corticosteroid injection may also be effective.
3. Blhiis
Blepharitis is a common chronic bilateral inflammatory
condition of the lid margins. Anterior blepharitis involves
the lid skin, eyelashes, and associated glands. It may be
ulcerative because of infection by staphylococci, or sebor-
rheic in association with seborrhea of the scalp, brows, and
ears. Posterior blepharitis results from inflammation of the
meibomian glands. There may be bacterial infection, par-
ticularly with staphylococci, or primary glandular dysfunc-
tion, which is strongly associated with acne rosacea.
»Clinical Findings
Symptoms are irritation, burning, and itching. In anterior
blepharitis, the eyes are “red-rimmed” and scales or col-
lerettes can be seen clinging to the lashes. In posterior
blepharitis, the lid margins are hyperemic with telangiecta-
sias, and the meibomian glands and their orifices are
inflamed. The lid margin is frequently rolled inward to
produce a mild entropion, and the tear film may be frothy
or abnormally greasy.
Blepharitis is a common cause of recurrent conjunctivi-
tis. Both anterior and, especially, posterior blepharitis may
be complicated by hordeola or chalazia; abnormal lid or
lash positions, producing trichiasis; epithelial keratitis of
the lower third of the cornea; marginal corneal infiltrates;
and inferior corneal vascularization and thinning.
»Treatment
Anterior blepharitis is usually controlled by eyelid hygiene.
Warm compresses help soften the scales and warm the mei-
bomian gland secretions. Eyelid cleansing can be achieved
by gentle eyelid massage and lid scrubs with baby shampoo
or 0.01% hypochlorous acid. In acute exacerbations, an
antibiotic eye ointment, such as bacitracin or erythromycin,
is applied daily to the lid margins.
Mild posterior blepharitis may be controlled with regu-
lar meibomian gland expression and warm compresses.
Inflammation of the conjunctiva and cornea is treated with
long-term low-dose oral antibiotic therapy, eg, tetracycline
(250 mg twice daily for 2–4 weeks), doxycycline (100 mg
daily for 2–4 weeks), minocycline (50–100 mg daily for
2–4 weeks) erythromycin (250 mg three times daily for
2–4 weeks), or azithromycin (500 mg daily for 3 days in three
cycles with 7-day intervals). Short-term (5–7 days) topical
corticosteroids, eg, prednisolone, 0.125% twice daily, may
also be indicated. Topical therapy with antibiotics, such as
ciprofloxacin 0.3% ophthalmic solution twice daily, may be
helpful but should be restricted to short courses of 5–7 days.
Amescua G et al; American Academy of Ophthalmology Pre-
ferred Practice Pattern Cornea and External Disease Panel.
Blepharitis Preferred Practice Pattern®. Ophthalmology.
2019;126:P56. [PMID: 30366800]
4. enoion & ecoion
Entropion (inward turning of usually the lower lid) occurs occa-
sionally in older people as a result of degeneration of the lid
fascia or may follow extensive scarring of the conjunctiva and
tarsus. Surgery is indicated if the lashes rub on the cornea. Botu-
linum toxin injections may also be used for temporary correc-
tion of the involutional lower lid entropion of older people.
Ectropion (outward turning of the lower lid) is common
with advanced age. Surgery is indicated if there is excessive
tearing, exposure keratitis, or a cosmetic problem.
5. tumos
Lid tumors are usually benign. Basal cell carcinoma is the
most common malignant tumor. Squamous cell carcinoma,
meibomian gland carcinoma, and malignant melanoma
also occur. Surgery for any lesion involving the lid margin
should be performed by an ophthalmologist or suitably
trained plastic surgeon to avoid deformity of the lid. Histo-
pathologic examination of eyelid tumors should be routine,
since 2% of lesions thought to be benign clinically are found
to be malignant. Medications such as vismodegib (an oral
inhibitor of the hedgehog pathway), imiquimod (an immu-
nomodulator), and 5-fluorouracil occasionally are used
instead of or as an adjunct to surgery for some basal and
squamous cell carcinomas.
6. Dcyocysiis
Dacryocystitis is infection of the lacrimal sac usually due to
congenital or acquired obstruction of the nasolacrimal
system. It may be acute or chronic and occurs most often
in infants and in persons over 40 years. It is usually unilat-
eral. Infection is typically with S aureus and streptococci in
acute dacryocystitis and Staphylococcus epidermidis, strep-
tococci, or gram-negative bacilli in chronic dacryocystitis.
Acute dacryocystitis is characterized by pain, swelling,
tenderness, and redness in the tear sac area; purulent mate-
rial may be expressed. In chronic dacryocystitis, tearing and
discharge are the principal signs, and mucus or pus may
also be expressed.
Acute dacryocystitis responds well to systemic antibi-
otic therapy. To relieve the underlying obstruction, surgery
is usually done electively but may be performed urgently in
acute cases. The chronic form may be kept latent with sys-
temic antibiotics, but relief of the obstruction is the only
cure. In adults, the standard procedure is dacryocystorhi-
nostomy, which involves surgical exploration of the lacri-
mal sac and formation of a fistula into the nasal cavity and,
if necessary, supplemented by nasolacrimal intubation.
Congenital nasolacrimal duct obstruction is common
and often resolves spontaneously. It can be treated by prob-
ing the nasolacrimal system, supplemented by nasolacrimal
intubation or balloon catheter dilation, if necessary; dac-
ryocystorhinostomy is rarely required.
CONJUNCTIVITIS
Conjunctivitis is inflammation of the mucous membrane
that lines the surface of the eyeball and inner eyelids. It may
be acute or chronic. Most cases are due to viral or bacterial
CMDT22_Ch07_p0167-p0200.indd 168 29/06/21 8:31 PM