Minor differences in colour perception between pseudophakic, phakic, and spectacle aphakic eyes were identified by the Pickford-Nicholson anomaloscope and the Farnsworth-Munsell 100-hue test. The results suggest that pseudophakic eyes are more sensitive to red and less sensitive to blue than aphakic eyes corrected with spectacles. Spectrophotometer measurements reveal that the Rayner-Pearce pos...

AIM To explore the application of intraoperative wavefront aberrometry (IWA) for aphakia-based biometry using three existing formulae derived from autorefractive retinoscopy and introducing new improved formulae. METHODS In 74 patients undergoing cataract surgery, three repeated measurements of aphakic spherical equivalent (SE) were taken. All measurements were objectively graded for their qu...

Subluxation or dislocation of PCIOL is one of the complications of cataract operation in RP patients. This paper reports the presentation of PCIOL dislocation and subluxation and the management and outcome in 3 eyes of 2 RP patients. Two medical records of patients with RP who developed dislocated or subluxated PCIOL and subsequently underwent explantation of the dropped IOL were evaluated. Two...

The size of the retinal image in the corrected aphakic eye is some 24% larger than the image before removal of the crystalline Len's. This large differential makes binocular vision impossible in individuals with unilateral aphakia corrected by spectacle lenses. A similar calculation, but with a contact lens correction, reduces this figure to about 8% (Dawson, 1962) . Theoretically, intraocular ...

BACKGROUND This paper describes a modified surgical technique for intraocular lens implantation in aphakic eyes with no capsular support. METHODS Retrospective case series. Seventeen eyes of 17 aphakic patients with no capsule support underwent intraocular lens (IOL) implantation using a standardized technique in which a net was created at the ciliary sulcus plane with two threads forming a n...

To determine the extent to which the visual experience of one eye may influence the refractive development of its fellow eye, we analyzed the data of untreated (UT) eyes of monkeys that received different types of unilateral pattern deprivation. Subjects were 15 juvenile rhesus monkeys, with five monkeys in each of three treatment groups: aphakic eyes with optical correction (AC), aphakic eyes ...

PURPOSE To evaluate the indications, lens styles, perioperative findings, and results of intraocular lens (IOL) explantation or exchange performed in the authors department in 2005. METHODS The retrospective analysis comprised 22 patients (23 eyes). Twenty-one eyes had previous phacoemulsification and IOL implantation, one eye secondary aphakic IOL, and one eye phakic IOL implantation. The in...

Early surgery for unilateral congenital cataracts—why? Some might protest that visual results are notoriously poor after surgery for a unilateral congenital cataract. Why drag the family and child through all the turmoil required for the treatment of infantile cataracts for, at best, a “spare eye”? The answer is simple: two eyes are better than one. Two eyes give us a larger field of view, a re...

BACKGROUND Refraction change of silicone oil (SO) tamponade in phakic and aphakic eye has been studied thoroughly; however, it is rarely studied in pseudophakic eye. In this paper we aimed to deduce a theoretical formula predicting refractive shift of silicone oil tamponade in pseudophakic eye and compared it with clinical findings. METHOD A theoretical formula was deduced through strict geom...

Early surgery for unilateral congenital cataracts—why? Some might protest that visual results are notoriously poor after surgery for a unilateral congenital cataract. Why drag the family and child through all the turmoil required for the treatment of infantile cataracts for, at best, a “spare eye”? The answer is simple: two eyes are better than one. Two eyes give us a larger field of view, a re...