Fundo de olho pela oftalmoscopia direta - Mapeamento de retina

Examination of the Anterior Segment and Fundus

Overview of the Procedure

• The procedure is essential for examining the anterior segment, assessing the red reflex, and evaluating the fundus, which includes analyzing the optic nerve, retinal vessels, retina, macula, and fovea.

• With proper training and guidance, this routine can reveal significant abnormalities in eye health.

Required Materials

• Necessary materials include an ophthalmoscope and mydriatic eye drops.

• The environment should be partially or fully darkened to maintain pupil dilation during examination.

Pupil Dilation Techniques

• Tropicamide (1%) or phenylephrine (2.5%) are commonly used for pupil dilation; cyclopentolate (0.5%) can also be utilized for prolonged mydriasis.

• Even without dilation, valuable information can still be gathered from the examination.

Conducting the Eye Examination

Patient Positioning and Focus

• Hold the ophthalmoscope with your right hand to examine the patient's right eye and with your left hand for their left eye.

• Instruct patients to fixate on a point directly ahead to facilitate a clear view during examination.

Assessing Red Reflex

• Check for total or partial absence of red reflex as it indicates potential issues; adjust angles to observe changes in reflex visibility.

Detailed Fundus Examination

Observing Key Structures

• Rotate lenses until achieving a clear view of the optic disc; it should appear yellow-orange with defined borders.

• Inspect retinal features: arteries should appear light red while veins are darker; assess size ratios between them.

Macula Inspection

• Direct patient gaze up/down/sideways to examine different retinal areas effectively.

• Locate fovea adjacent to optic disc; note any abnormalities in macular region using appropriate filters for enhanced visualization.

Post-examination Considerations

Patient Information

• Inform patients that pupil dilation may last from 3 to 24 hours based on drop type used and individual susceptibility.

Side Effects Awareness