Mild-to-severe pain, reduced vision, or may be asymptomatic. Patient with recent glaucoma filtering surgery may complain of excessive tearing.
Critical
Low IOP, usually ≤5 mm Hg, but may occur with an IOP as high as 10 mm Hg.
Other
Corneal edema and folds, corneal decompensation, aqueous cell and flare, shallow or flat anterior chamber, retinal edema, hypotony maculopathy, chorioretinal folds, serous choroidal detachment, suprachoroidal hemorrhage, optic disc swelling, and retinal vascular tortuosity.
NOTE: |
A wound leak may drain under the conjunctiva, producing an inadvertent filtering bleb. May be seen in old extracapsular cataract extraction wounds, which are large and may not completely close. Seidel test will then be negative. |
Repair of the underlying disorder may be needed if symptoms are significant or progressive. Low IOP, even as low as 2 mm Hg, may not cause problems or symptoms and may be observed.
Wound Leak
Shallow Anterior Chamber
If the anterior chamber is very shallow or flat, start a topical cycloplegic (e.g., cyclopentolate 1% t.i.d. or atropine 1% daily) and topical steroid (e.g., prednisolone acetate 1% or difluprednate 0.05% q2h), as long as no infectious process is suspected. This will rotate the iris-lens complex posteriorly and can deepen the chamber to prevent corneal endothelial damage.
Overfiltering Bleb
Compression with a large contact lens can at times reduce bleb exuberance. Surgical repair in the operating room may be required with compression sutures (transconjunctivally or directly over the scleral flap), placement of a corneal or scleral patch graft over a shrunken scleral flap, or removal of the aqueous shunt device from the anterior chamber.
Cyclodialysis Cleft
Reattach the ciliary body to the sclera by chronic atropine therapy, diathermy, suturing, cryotherapy, laser photocoagulation, or external plombage. See 3.7, IRIDODIALYSIS/CYCLODIALYSIS.
Scleral Perforation
The site may be closed by suturing or cryotherapy.
Iridocyclitis
Topical steroid (e.g., prednisolone acetate 1% or difluprednate 0.05% q16h) and a topical cycloplegic (e.g., cyclopentolate 1% t.i.d.). See 12.1, ANTERIOR UVEITIS (IRITIS/IRIDOCYCLITIS).
Retinal Detachment
Surgical repair. See 11.3, RETINAL DETACHMENT.
Choroidal Detachment
See 11.27, CHOROIDAL EFFUSION/DETACHMENT. Surgical drainage of the choroidal effusion along with reformation of the eye and anterior chamber is indicated for any of the following:
If these findings are not present, choroidal effusion can be managed conservatively with a topical cycloplegic and topical steroids for a period of time.
Pharmacologic
Reduce or discontinue the IOP-reducing medications.
Systemic Disorder
Refer to an internist.
NOTE: |
In myotonic dystrophy, the hypotony is rarely severe enough to produce deleterious effects, and treatment of hypotony, from an ocular standpoint, is unnecessary. |
If vision is good, the anterior chamber is well formed, and there is no wound leak, retinal detachment, or kissing choroidal detachments, then the low IOP poses no immediate problem, and treatment and follow up are not urgent. Fixed retinal folds in the macula may develop from long-standing hypotony.