OCT OF MCULAR DISEASES
DEHGHANI.A
near infrared light cross-sectional images of tissue High resolution) 10 µ ( Non contact
highest reflections →red and white colours
Lowest reflections →blue and black
1. 2 red bands →RNFL and RPE
2. green/yellow band →Ganglions cell layer
3. blue/black band → Photoreceptor layer
Reflectivity
Increased : inflammatory infiltrate, fibrosis, exudates and hemorrhage
Decreased reflectivity : retinal edema, hypopigmentation of the RPE
decreased uniformly :abnormalities of the media )small pupil (
Retinal thickness Increased : accumulation of
intraretinal fluid (diabetic retinopathy, cystoid macular oedema, retinal traction ( Decreased :scarring or atrophy
1. Diabetic Macular Edema2. AMD3. CSCR4. Macular Hole 5. Retinal Vascular Occlusions 6. Retinal Vasculitis 7. Epiretinal Membranes 8. CNV 9.Juxtafoveal Telangiectasia
10.Heredodystrophic Disorders Photic Maculopathy11. Inflammatory Diseases of Retina-choroid 12.Retinal Angiomatosis Proliferation13.Trauma 14.Macular Evaluation following Retinal Detachment
Surgery 15.Foveal Hemorrhage16.Intraocular Metastasis
DIABETIC MACULAR EDEMA
ROLE OF OCT IN DIABETIC MACULAR EDEMA
A.Defining the Disease Pattern
B. Defining Indications for Pars Plana Vitrectomy
C. Longitudinal Tracking of Tissue Alteration following An Intervention
Defining the Disease Pattern
1.Sponge-like retinal thickness 2.Cystoid macular edema3. Subfoveal serous retinal
detachment 4. Foveal tractional retinal
detachment 5. Taut posterior hyloid
membrane
After PRP
OCT IN AMD
Disease categorization Management issues Define indications for therapy Monitor response to the therapy
NON-NEOVASCULAR ARMD -Drusens- Geographic Atrophy Neovascular ARMD -classic CNV -occult CNV -serous PED -hemorrhagic PED -fibrovascular PED
OCT helps in the management of ARMD in the following ways:
-Disease categorization
-Early occult CNVM
-Associated changes
-Response to treatment
OCT IN CSCR
Typical CSCR
-Serous retinal detachment
-Serous retinal detachment with PED Atypical CSCR
-Small PEDs
-Chronic CSCR
-CSCR in elderly
OCT in diagnosing complications of CSCR
→ CNV
→ Subretinal fibrin
→ RPE rip
→ Neurosensory atrophy of fovea
SOLAR BURN
Diagnose subtle changes in the RPE-photoreceptorcomplex
OCT IN EPIRETINAL MEMBRANE
Confirming the diagnosis Identify the structural alterations Longitudinal tracking of these eye
following of vitrectomy
OCT IN INTRAOCULAR METASTASIS
Localizing the site of metastatic deposits
Monitoring response to the therapy
CONCLUSION:
1.Adjunct to thorough clinical examination and standard diagnostic examinations such as FFA and visual fields
2.Powerful diagnostic tool for macular disorders
3.Final diagnostic and therapeutic decision
The end
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