macular hole
TRANSCRIPT
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Macular Hole
Presenter: Dr Nusrat Jahan Bukhari
Moderator: Dr Archis Shedbale
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Case Presentation
Introduction
Classification
History
Pathogenesis
OCT classification
Clinical Features
Investigation
Treatment
Recent Advances
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Case Presentation
45 yr old male pt Mr ABC came in April 2012 with c/o sudden DOV since few days, gave a h/o RE injury (Blunt Trauma) with a Vn of 6/18, N12, diagnosed Traumatic Maculopathy
August 2014 Vn in RE dropped to FC 11/2metre, on retinal examination diagnosed Traumatic Macular Hole
In Jan 2015 Patient underwent RE Vit+ ILM Peeling+ FAE+ C3F8 , Day 1 post op Vn improved to FC 2metre
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Case Presentation: c/o DOV in RE since April 2012
O/E RE LE
Ant Seg: WNL WNL
IOP: 20 mmHg 17 mm Hg
Fundi: Traumatic 0.4:1
Macular Hole
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Introduction
A full-thickness depletion of the neural retinal tissue in the center of the macula#
Most commonly unilateral**
Atraumatic “idiopathic” macular holes of the elderly comprise the vast majority of these lesions*
* Colin A. McCannel et al. Population Based Incidence of Macular Holes. Ophthalmology. 2009 Jul; 116(7): 1366–1369
** Chew E, Sperduto R, Hiller R, et al: Clinical course of macular holes. Arch Ophthalmol117:242, 1999
# Chapter: Macular Hole, Yanoff & Duker Ophthalmology
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Sen P et al evaluated the prevalence of Macular Hole in a study conducted in south India
1.7 / thousand population
Sen P et al, Prevalence of idiopathic macular hole in adult rural and urban south Indian population.Clin Experiment Ophthalmol 2008 Apr;36(3):257-60
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Colin A. McCannel et al. Population Based Incidence of Macular Holes. Ophthalmology. 2009 Jul; 116(7): 1366–1369
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Etiology
Common causes:
Idiopathic
Trauma
high myopia
Other causes:
cystoid macular edema
proliferative diabetic retinopathy
severe hypertensive retinopathy
Choroidal neovasculatrisation
Solar retinopathy
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Classification
Primary macular hole: is commonly an idiopathic macular hole
Caused by vitreous traction on the foveal from an abnormal vitreous seperation
Secondary Macular hole: caused by other pathologies not associated with vitereomacular traction
blunt trauma, high myopia, macular telangiectasia type2, diff causes of macular oedema
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History
Macular hole first recognized approximately 100 years ago
First described by Knapp in late 1800s
Later described by Noyes
First histopathologic descriptions of full-thickness macular holes were provided by Fuchs (1901)* and Coats (1907)**
Gass first described a series of stages of formation of idiopathic macular hole in 1988
*Fuchs E. Zur Veranderung der Macula Lutea Nach Contusion. Ztschr Augenheilk 1901;6:181
**Coats G. The pathology of macular holes. Roy Lond Hosp Rep 1907; 17-69
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Pathogenesis Traumatic Theory*
associated with direct or indirect ocular trauma
Trauma causes immediate macular hole formation from mechanical energy created by vitreous fluid waves and contrecoup macular necrosis or laceration
More common in young boys
*Kopp CJ.Macular holes:a clinical contribution.Am ophthalmology 1908; 11:518-528
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Cystoid degeneration theory*:
cystic degeneration of the central macula
due to :hypertension, retinal vessel occlusion, trauma
Cyst coalescence FTMH
*Coats G. The pathology of macular holes. Roy London Hospital Report 1907; 17:69-96
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Vascular theory:
Age related changes of retinal vasculature
cystoid degeneration
macular hole formation
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Vitreous Theory:
Antero posterior fibrous traction band
Macular traction
Macular cystoid degeneration
Macular hole
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Current theory Posterior hyaloid applies traction to the
foveola/umbo and causes it to stretch
umbo dehisces because it is the thinnest point in
the fovea
middle and inner retina absorbs vitreous fluid at the exposed edges of the hole and begins to swell
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hole enlarges because of a lateral extension of fluid into the outer
plexiform layer
inner retina is breached
due to the hydration of the fovea and perifoveal
macula, the macular hole progresses
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Concept of tangential traction*
Spontaneous tangential traction of external part of the perifoveolar cortical vitreous detaches foveolar retina
Creates an intraretinal yellow spot approximately 100-200μm in diameter
Yellow color may result from intraretinal xanthophyllpigment
* Avila MP, Jalkh AE, Murakami K, et al. Biomicroscopic study of the vitreous in macular breaks. Ophthalmol 1983; 90:1277-83
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Role of ILM in pathogenesis of Macular Hole
scaffold for proliferation of cellular components
Like myofibroblasts, fibrocytes,RPE cells,
fibrous astrocyts
Causing tangential traction around fovea
FTMH formationMay also contribute to enlargement of MH
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Revised Gass classification:
Gass first described a series of stages of formation of idiopathic macular hole *
*GASS JIM. Reappraisal of biomicroscopically 0f stages of Development of a macular Hole. Am J Ophthalmolgy.1995; 119 :752-59
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Stage 1 a Spontaneous tangential
traction of prefoveolarcortical vitreous detaches foveolar retina
creating an intraretinalenhanced lipofuscin-colored yellow spot 100-200μm in diameter
Decreased/ absent fovealdepression
Foveolar detachment
Retinal Pigment Epithelium
Neurosensory RetinaPosterior Hyaloid
Normal Fovea
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Stage 1 b
Further traction causes foveal detachment
yellow spot 2̂00-300μm in diameter
Foveal detachment
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Stage 2
First biomicroscopically identifiable full thickness retinal defect
Less than 400μ
Early hole, central
Early hole, eccentric
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Stage 3
Vitreofoveal seperation
Enlarges to greater than 400μ
Complete PVD is absent
Stage 3 Hole
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Stage 4
Complete posterior vitreous detachment (Weiss’ ring) occurs in 20% - 40% of eyes
Stage 4 Hole
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vitreous adhesion to central macula with no demonstrable retinal morphology changes
vitreous adhesion to central macula , demonstrable changes like tissue cavitation, cystoid changes, loss of fovealcontour, elevation of fovea
Jay S et al. The International Vitreomacular Traction Study Group. Classification of vitreomacularadhesion, traction & macular hole. The American Academy of Ophthalmolgy. 2013.2611-19.
OCT based anatomic classification of FTMH
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Small Hole ≥250μ, round or have a f flap adherent to vitreous,
operculum ₊/-
Medium FTMH hole 250 - 400μ,
• round/ flap adherent to vitreous
Large FTMH hole >400μ,
• vitreous more likely to be fully seperated
• from macula
Jay S et al. The International Vitreomacular Traction Study Group. Classification of vitreomacularadhesion, traction & macular hole. The American Academy of Ophthalmolgy. 2013.2611-19.
OCT based anatomic classification of FTMH
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Clinical features
Visual acuity the first indicator but sometimes misleading
Mild loss of central vision (Stage 1a & 1b)
Metamorphopsia
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FTMH is diagnosed on slitlamp biomicroscopy
By off centering the beam we can study the contour of hole and vitreous interface
differentiates FTMH from other lesionsPositive & Negative Watzke - Allen Sign
Watzke RC, Allen L. Subjective slit- beam sign for macular disease. Am J Ophthalmol1969; 449 - 453
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In eyes with ERM a fibrotic appearance with distortion of perifoveal vessels seen
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Amsler Grid:
Small absolute scotomas can be detected in 30 -40 % of patients*
Charting used but not specific for macular hole
Can be used in post operative period to evaluate scotoma and metamorphopsia
*Smith RG et al. Visual Performance in idiopathic macular holes. Eye 1990; 4: 190 -194
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Investigations
OCT
FFA
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Optical coherence tomography (OCT):
diagnosis of macular hole but also in staging
helpful in prognosticating depending upon size of the macular hole
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Flourescein Angiography:
Usually not indicated in diagnosis of macular hole
But generally demonstrates early hyperfluoresence (window defect)
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Laser Aiming Beam Test:
Place a 50μm laser photocoagulator aiming beam within a lesion
Patient with FTMH cannot detect the aiming beam within lesion but is able to detect it in its surrounding
Patients with ERM or Pseudomacular hole shall be able to detect
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B- Scan Ultrasonography:
Predictive of vitreomacular relationship and therefore may be helpful in staging
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Differential Diagnosis
Epiretinal membrane with pseudomacular hole
Lamellar macular hole
Chronic cystoid macular edema
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ERM with Pseudomacular hole
have a median visual acuity of 20/30
retinal vascular tortuosity
not associated with a rim of subretinal fluid
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Lamellar macular hole Sharply circumscribed
Partial-thickness defects of the macula
Represents either as an aborted full-thickness lesions or a complication of chronic cystoid macular edema*
Characterized by a flat, reddish hue-type lesion with intact outer retinal tissue
Careful evaluation will reveal retinal tissue in the base of the lesion
No evidence of subretinal fluid
Do not progress to full-thickness lesions
* Patel B, Duvall J, Tullo AB. Lamellar macular hole associated with idiopathic juxtafoveolar telangiectasia. Br J Ophthalmol 1988;72:550
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Lamellar Macular Hole
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Chronic cystoid macular edema
Seen sometimes post cataract surgery
In diabetic macular edema
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Pre operative parameters
Hole form factor > 0.9 and Macular Holeindex > 0.5 also have a better prognosis
a = base diameter, b = minimum diameterc = left arm length, d = right arm length
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Correlation of hole form factor and best corrected postoperative visual acuity
S. Ullrich et al. Macular hole size as a prognostic factor in macular hole surgery. Br J Ophthalmol. 2002 Apr; 86(4): 390–393
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Management
Symptoms of impending holes : visual distortion, decreased visual acuity, and changes observed with home Amsler grid testing
Macular holes can resolve spontaneously
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This most commonly occurs in stage 1 but has been reported for stage 2 holes as well
The resolution occurs when the posterior hyaloidseparates
Hence, it is better to observe them for a few months
If vision deteriorates or the hole progresses, vitreous surgery is indicated
Management
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Surgery
Pars Plana Vitrectomy with internal limiting membrane peeling with gas tamponade is performed for stage 2-4 FTMH
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Pars Plana surgical procedures
Using three- port system
After removing central vitreous the posterior cortical vitreous is identified and seperated from retinal surface
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Chromovitrectomy
Use of vital dyes to stain pre retinal tissues during vitreoretinal surgery
Allows visualization of the thin, transparent tissues in vitreoretinal interface : ILM, epiretinal ERM, or the vitreous posterior surface
Indocyanine Green Dye(ICG): 0.25mg/ml
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Trypan Blue(0.15%): stains ERM, but not ILM
Triamcinalone Acetonide(40mg/ml): stains residual vitreous
Brilliant Blue(0.025% & 0.05%): excellent stain for ilm, relatively non toxic
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In idiopathic FTMH the rationale would be to remove or relieve foveal traction from within the retinal surface1
Helps by ensuring complete removal of any epiretinaltissue above the ILM that could cause foveal traction2
as well as by increased cytokine release
enhancing glial proliferation
ILM Peeling
1- Fekrat S, Wendel RE, de la Cruz Z, Green WR: clinicopathologic correlation of an epiretinalmembrane associated with a recurrent macular hole. Retina 1995; 1:53-57
2- Yooh HS, Brooks HL Jr, Capone A Jr, et al. Ultra structural features of tissue removed during idiopathic macular hole surgery. Am J Ophthalmol 1996;1:67-75
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Types of closure
On the basis of post operative OCT findings closed macular holes are:
Type 1 & type 2 closure
S W Kang et al. Types of macular hole closure and their clinical implications. Br J Ophthalmol 2003; 87: 1015 - 1019
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Type 1 Closure
Indicates that macular hole is closed without fovealdefect of the neurosensory retina
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V/A: 6/36, N 10
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Type 2 closure
Indicates a foveal defect of neurosensory retina persists postoperatively
Although thewhole rim of macular hole is attached to the underlying RPE with flattening of the cuff
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Post operative parameters OCT parameters: Type 1 closure of MH without
neurosensory defect) has a better visual outcome compared to Type 2 closure (with neurosensorydefect)
Continuous IS/OS junction and external limiting membrane as well as increased photoreceptor outer segment thickness predicts a better
functional outcome1Kang ST, Ahn K, Ham DI. Types of macular hole closure and their clinical implications. Br J Ophthalmol. 2003; 87:1015-19
2San M, Shimoda Y, Hashimoto H.Restored photoreceptor outer segment and visual recovery after macular hole closure . Am J Ophthalmol 2009; 147:313-18
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Recent AdvancesPharmacologic vitreolysis new nonsurgical option that can aid closure of
macular holes associated with VMT
degrades the macromolecular vitreous attachment complex
relieves the tractional forces that cause the foveallesion
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In MIVI TRUST study patients with FTMHs less than 400 microns in width, the closure of holes occurred in 40.6% of ocriplasmin treated eyes and 10.6% of placebo treated eyes*
In patients with small hole the success rate was even higher
This occurred without face down position, surgery or gas bubble
Makes it an appealing option for appropriate patients
* Stalmans P, Benz MS, Gandorfer A, Kampik A.et al. MIVITRUSTal study group. Enzymatic vitreolysis with Ocriplasmin for Vitreomacular Traction and Macular holes.N Engl J Med 2012; 367: 606-15
Pharmacologic vitreolysis
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