Temporal Change in Anterior Chamber Depth after Combined Vitrectomy and Cataract Surgery Using Different Sizes of Intraocular Lens

Abstract

This study aimed to investigate the temporal changes in the anterior chamber depth (ACD) and refractive prediction error (RPE) of 6 and 7 mm diameter intraocular lenses (IOLs) after cataract surgery or phacovitrectomy with or without sulfur hexafluoride (SF6) gas. We reviewed 120 eyes (120 patients) and divided them into six groups: three groups of cataract surgery alone and phacovitrectomy (with or without SF6), which were further divided according to IOL diameter (6 and 7 mm) used. We examined the ACD and IOL position using a swept-source anterior segment optical coherence tomograph at 1 day, 1 week, and 1 month postoperatively; and the RPE at 1 month postoperatively. The ACD and IOL position at postoperative day 1 in the SF6 injection groups were significantly smaller than those in the other groups (p < 0.01). At 1 week, the ACD and IOL position of the 6 mm IOL SF6 injection group was smaller than those in the other groups (p < 0.01); thus, complications such as synechia or pupillary capture should be considered in the early postopera-tive period of phacovitrectomy with SF6, especially in the 6 mm IOL. The ACD, IOL position, and RPE at 1 month did not significantly differ among the groups, regardless of the IOL diameter or SF6. In the SF6 injection groups, the ACD and IOL position gradually deepened with less gas.

Influence of endotamponade on anterior chamber depth and refractive outcome after combined phacovitrectomy: case-control study

“…In agreement with our results, the ACD deepened in the further follow-up and remained statistically equal between the 2 groups at 4 weeks postoperatively. 18 Instead, another group reported an anterior shift of the IOL in eyes that underwent phacovitrectomy with gas (SF 6 ) instillation 4 weeks postoperatively, which contradicts our data obtained at 6 weeks postoperatively. 14 However, a smaller study size and a shorter observation period of 4 weeks with the possibility of Preoperative and postoperative ACDs at day 1 to 2 and after 6 weeks after the application of different endotamponades and in the cataract surgery-alone group (vitreous).…”

“…Compared with the anticipated refractive outcome, we found a tendency toward a minor myopic error, which is in line with the literature. 5,6,12,15,18 There are several possible explanations for this myopic outcome. First, laser interferometry in the biometer and the refractor could be biased by alterations in the posterior pole because of the retinal pathologies studied, such as macular thickening and retinal detachment.…”