Optic Neuritis Definition h

Optic neuritis is an inflammation of the optic nerve that may occur within the globe (papillitis) or posterior to it (retrobulbar optic neuritis).

Epidemiology: Optic neuritis occurs most frequently in adults between the ages of 20 and 45. Women are more frequently affected than men. Twenty to forty per cent of all patients with optic neuritis develop diffuse encephalitis (multiple sclerosis).

ST 10 0

Fig. 13.10 c Functional findings. The enlarged blind spot (indicated by hatching) is an early functional correlate to ophthalmoscopic findings. The blind spot is an absolute scotoma (indicated by cross-hatching), meaning that the patient cannot discern marker ""¡" — ~ "ZZZ • """

V/4.The enlargement of the blind spot (indicated by hatching) is a relative scotoma, meaning that the patient cannot discern marker 1/4. The markers used in the test are light markers of varying size (indicated by Roman numerals) and varying light intensity (indicated by Arabic numerals and letters). The larger the number, the larger the size and greater the light intensity of the respective marker. The table at the lower right shows which markers were used in the test. The table at the lower left shows the values corresponding to the numerals and letters.

Table 13.1 Differential diagnosis of pseudopapilledema, optic disk drusen, and papilledema

Differential criterion Pseudopapill- Optic disk drusen Papilledema edema

Size of optic disk

Optic cup

Spontaneous venous pulse

Veins and papillary capillaries

Color of optic disk

Peripapillary bleeding

Peripapillary nerve fibers

Angiography Ultrasound

Small Absent

Possibly present

Normal

Normal Absent

Normal

Normal

Atypical

Small Absent

Possibly present

Normal

Pale Absent

Normal

Intrinsic fluorescence

Highly reflective deposits

Unaffected Initially present Absent

Obstructed

Hyperemic Present

Edematous

Early leakage

Atypical

Stretch Marks

Stretch Marks

Stretch Marks Prevention and Treatment. Learn What Exactly Are Stretch Marks And How Can They Be Treated. MP3 Audio included for your PC or IPod.

Get My Free Ebook and Audio


Post a comment