Night Vision And Dysphotopsia After Evo Icl: Objective And Subjective Assessment

Night vision disturbances remain a major concern after refractive surgery despite excellent visual acuity outcomes. The EVO Implantable Collamer Lens (ICL) with a central port was designed to optimize optical quality, yet postoperative dysphotopsia persists in a subset of patients.

to evaluate night vision quality and dysphotopsia after EVO ICL implantation using combined objective and subjective assessments, and to identify factors associated with postoperative night vision symptoms.

Patients : 30 patients (60 yeux) ayant bénéficié d'une implantation bilatérale d'implants ICL EVO

Suivi : préopératoire, puis à 1, 3 et 6 mois.

Dominance oculaire : déterminée en préopératoire (test de Miles) et enregistrée pour analyse secondaire

Analyse de centrage et d'inclinaison de l'ICL

Évaluation subjective

Questionnaire sur la qualité de la vision (QoV)

Évaluation des symptômes de la vision nocturne (halos, éblouissements, halos)

Échelle de satisfaction des patients

Mesures des résultats

Incidence et gravité de la dysphotopsie

Corrélation avec la taille de la pupille, la voûte, les changements d'aberrations optiques d'ordre supérieur et la taille de l'ICL

Comparaison exploratoire entre l'œil dominant et l'œil non dominant

Uncorrected distance visual acuity improved significantly in all 60 eyes.

Objective optical metrics showed no clinically significant increase in higher-order aberrations.

Night vision symptoms were mostly mild and decreased significantly between 1 and 6 months.

Larger scotopic pupil diameter and excessive vault were associated with higher dysphotopsia scores.

Dominant eyes reported higher subjective dysphotopsia scores than non-dominant eyes, despite similar objective optical parameters.

VO ICL implantation provides excellent visual outcomes with a low incidence of persistent dysphotopsia. While objective optical quality is preserved, ocular dominance appears to influence patient perception of night vision disturbances, highlighting the importance of individualized preoperative counseling.