Visual Outcome in Scleral Fixated Intraocular Lenses

Abstract

BACKGROUNDCollagen is the most abundantly present connective tissue. In higher animals, primarily as extracellular insoluble fibres and the fibres account for large part of organic mass of skin, tendon, blood vessel, bone teeth, cornea and vitreous humour. Collagen also provides the framework of parenchymal organs and basement membrane. The collagens constitute a family of proteins selected during evolution for the execution of several (mainly structural) functions. During the process of evolution of multicellular organisms, a family of structural proteins was selected by both environmental influences and the functional requirements of the animal organism and developed to acquire varying degrees of rigidity, elasticity and strength. These proteins are known collectively as collagen and the chief examples among its various types are present in the skin, bone, cartilage, smooth muscle and basal lamina. Collagen is the most abundant protein in the human body representing 30% of its dry weight. The collagens are produced by several cell types and are distinguishable by their molecular compositions, morphologic characteristics, distribution, functions and pathologies. More than 20 types of collagen have been identified and designated with Roman numerals; the most important of these are listed in Table 5-3. They are classified into the following four categories according to their structure and general functions.

Scleral-Fixated Intraocular Lens: Indications and Results

“…Some surgeons advocate that in experienced hands, fixating an IOL to the sclera offers a visual prognosis which is good enough to favor this procedure as the standard of care for correcting aphakia in patients with insufficient capsular support [12]. With its limitations and lack of long-term follow-up, our study supports this idea.…”

“…One major advantage of scleral-fixated IOL, especially for a vitreoretinal surgeon, is that any future vitreoretinal surgery procedure can be performed with no risk of IOL dislocation, as may happen in anterior placed IOLs [12]. Moreover, these complicated cases in which secondary IOLs are indicated are at risk to develop posterior segment complications that require proper examination and even surgical treatment.…”

“…Moreover, these complicated cases in which secondary IOLs are indicated are at risk to develop posterior segment complications that require proper examination and even surgical treatment. Pupil dilatation and examination of the retina and vitreous are much easier in an eye with scleral-fixated IOL than in one with ACIOL or iris-fixated IOL [12]. Besides, PPV which is usually performed before suturing IOL at the sclera considerably decreases the risk of future posterior segment complications in these patients.…”

“…In all our cases, prior to suturing IOL at the sclera, PPV has been performed. This contributed to visual function improvement by eliminating all the debris, blood, and inflammatory cells from the vitreous cavity which are specific for the posttraumatic and complicated postcataract surgery settings [12].…”

Visual Outcome after Scleral Fixation of Intraocular Lens (SFIOL) Implantation Following Pars Plana Vitrectomy (PPV) and Removal of dropped Intra-Ocular Lens (IOL)

“…Similar complications were also observed in other studies regarding the visual outcome after SFIOL. 6,7,8 The study by Ali et al showed postoperative complications such as ocular hypotony (9.4%), ocular hypertension (7%), and vitreous hemorrhage (7%), which were absent in the findings of our study. Overall the surgical and visual outcome was good in this study.…”