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Parallel Beam Convergence Divergence

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Parallel Beam Convergence Divergence

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CLINICAL REFRACTION

• 1 OBJECTIVE REFRACTION ( RETINOSCOPY )• 2 SUBJECTIVE REFRACTION

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RETINOSCOPY

• POSITIONING AND ALIGNMENT• FIXATION AND FOGGING• RETINAL REFLEX• CORRECTING LENS• NEUTRALITY

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Speed brilliance width

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FINDING CYLINDER AXIS

1. BREAK2. WIDTH3. INTENSITY4. SKEW

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• Cross cylinders

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REFINING OF SPHERE

• Endpoint strongest plus and weakest minus• Duochrome test

• RAM-GAP ( red add minus green add plus)

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BINOCULAR BALANCE

1. FOGGING2. PRISM DISSOCIATION3. CYCLOPLEGIA

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