Dynamic Vaulting Changes in V4c versus V4 Posterior Chamber Phakic Lenses Under Differing Lighting Conditions

Computational Study of Aqueous Humor Dynamics Assessing the Vault and the Pupil Diameter in Two Posterior-Chamber Phakic Lenses

“…31 It has been shown in comparative studies that the vault with the V4c is equivalent to that observed with V4b. 16,19,30 However, contrary to V4c, where the vault substantially affects the flow, through the PI in V4b, the flow is not altered regardless of the vault, being practically independent.…”

“…The vault is an important parameter, [28][29][30] and different studies have observed that a low vault (<250 lm) increases the risk of cataract formation, 12,20,29 whereas a high vault (>750 lm) could cause a pupillary block and secondary glaucoma. 31 It has been shown in comparative studies that the vault with the V4c is equivalent to that observed with V4b.…”

Comparison of early changes in and factors affecting vault following posterior chamber phakic Implantable Collamer Lens implantation without and with a central hole (ICL V4 and ICL V4c)

“…Several studies [12–15] have shown that pupil constriction leads to a significant decrease in central vault under photopic conditions, as it causes ICL movement posteriorly towards the crystalline lens. These findings have been supported by Du et al [16] who demonstrated similar outcomes during pharmacological accommodation with the use of topical pilocarpine.…”

“…Previous studies [12–15] have shown that the pupil constriction in response to light can affect the vault, eventually causing the ICL to move posteriorly towards the crystalline lens, leading to a significant decrease in central vault under photopic conditions. Du et al [16] reported that the distance between the ICL and the crystalline lens reduced as the ICL was moved posteriorly by the iris as a result of pupil constriction during pharmacologic accommodation with topical pilocarpine.…”

Anterior segment optical coherence tomography angle and vault analysis after toric and non-toric implantable collamer lens V4c implantation in patients with high myopia

“…Lee et al determined that the most important factor to estimate the vault is the disparity between the ICL and the diameter of STS 12. Others, like Kamiya et al , have studied factors influencing the achieved vault, such as patient age, and they observed that the achieved vault decreases about 10 μm per year of age, a statistically significant result; other factors were found to have greater influence on the vault such as the ICL size, anterior chamber amplitude and a positive correlation of the latter with keratometric average 15…”