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