Nystagmus kufamba kusingaite kwe rhythmic oscillatory kufamba kwemaziso ese kana zvakanyanya kashoma paziso rimwe chete.

Kune marudzi maviri e nystagmus:

• pendular nystagmus, inoumbwa ne sinusoidal oscillations yekumhanya kwakafanana
• uye spring nystagmus ine chinhanho chinononoka chinochinjana nechikamu chinokurumidza chekugadzirisa

Muzvizhinji zvezviitiko, nystagmus yakachinjika (kufamba kubva kurudyi kuenda kuruboshwe uye kuruboshwe kuenda kurudyi).

Nystagmus inogona kuve yakajairika chiratidzo kana inogona kubatanidzwa kune iri pasi peiyo pathology.

Physiological nystagmus

Nystagmus inogona kuva chiratidzo chakajairika. Inoonekwa muvanhu vari kutarisa mifananidzo inopfuura pamberi pemeso avo (mufambi akagara muchitima uye achiedza kutevera mifananidzo yenzvimbo inopfuura pamberi pake). Izvi zvinonzi optokinetic nystagmus. Inoratidzwa nenhevedzano inononoka jerks yeziso inotevera chinhu chinofamba uye jerk rinokurumidza rinoratidzika kurangarira mboni yeziso.

Pathological nystagmus

Inobva pakukanganiswa kwekuenzanisa pakati pezvimiro zvakasiyana-siyana zvinotarisirwa nekugadzikana kweziso. Saka dambudziko rinogona kureva:

- pachiyero cheziso

- pamwero wenzeve yemukati

- pamwero wenzira dzekufambisa pakati peziso neuropi.

- pamwero wehuropi.