Bilateral implantation of a supplementary intraocular pinhole.

Purpose: To evaluate the safety and efficacy of bilateral implantation of a supplementary small-aperture device to treat irregular corneal astigmatism.

Setting: Private practice.

Design: Retrospective consecutive case series.

Toric intraocular lens combined with a supplementary pinhole implant to treat irregular corneal astigmatism.

A case of refractive lens exchange with the implantation of a supplementary intraocular pinhole (IOPH) to treat a challenging case of keratoconus is presented. Four months after the initial procedure, an intraocular lens (IOL) exchange (under the IOPH) was performed to a toric implant to correct the residual manifest astigmatism. This significantly improved both distance and near acuities and demonstrates how a toric IOL and astigmatism correction in combination with a pinhole device could be used to treat selected cases of keratoconus.

Long-term safety of in-the-bag implantation of a supplementary intraocular pinhole.

Purpose: To evaluate the long-term effectiveness and safety of the XtraFocus intraocular pinhole (IOPH) when it is implanted inside the capsular bag.

Setting: Private practice.

Design: Retrospective consecutive case series.

Intraocular pinhole implantation for irregular astigmatism after planned and unplanned posterior capsule opening during cataract surgery.

We present two cases for which intraocular pinhole implants were used to treat irregular corneal astigmatism after planned and unplanned posterior capsule opening during cataract surgery. The first case had a fibrotic posterior capsule that was eliminated with a posterior capsulorhexis. After that, the intraocular lens (IOL) and pinhole were implanted in the capsular bag.

Phacoemulsification with intraocular pinhole implantation associated with Descemet membrane endothelial keratoplasty to treat failed full-thickness graft with dense cataract.

We present a case in which a different approach was used to treat an eye with dense cataract associated with an irregular failed full-thickness corneal graft. After cataract surgery, a foldable intraocular pinhole was implanted in the capsular bag to treat the irregular corneal astigmatism. Next, a Descemet membrane endothelial keratoplasty graft was used to improve transparency in the failed penetrating keratoplasty.

New pinhole sulcus implant for the correction of irregular corneal astigmatism.

Purpose: To evaluate the effect on visual acuity of the implantation of a new intraocular pinhole device (Xtrafocus) in cases of irregular corneal astigmatism with significant visual impairment.

Setting: University of São Paulo, São Paulo, Brazil.

Design: Prospective case series.

Haptic-induced recurrent vitreous hemorrhage and increased intraocular pressure with a hydrophobic acrylic intraocular lens.

A 72-year-old white woman had phacoemulsification with implantation of a hydrophobic acrylic single-piece intraocular lens (IOL) (AcrySof SA60AT, Alcon) in the right eye. A few weeks after surgery, she reported episodes of blurred vision due to recurrent vitreous hemorrhage, which got worse over time. The increased intraocular pressure (IOP) noted after surgery was controlled with minimal topical treatment.

Spherical aberration and contrast sensitivity in eyes implanted with aspheric and spherical intraocular lenses: a comparative study.

Purpose: To determine whether implantation of an intraocular lens (IOL) with a modified anterior aspheric surface results in reduced spherical aberration and improved contrast sensitivity after cataract surgery.

Design: Prospective, comparative, interventional case series.

Methods: In an intraindividual randomized prospective study of 25 patients with bilateral cataract, an IOL with a modified anterior surface (Tecnis Z9001; Advanced Medical Optics, Santa Ana, California, USA; group 1) was compared with biconvex lens with spherical surfaces (ClariFlex; Advanced Medical Optics; group 2).

Transient cataract and hypermetropization in diabetes mellitus: case report.

A 13-year-old male patient with a recent history of hyperglycemia developed an acute bilateral posterior subcapsular cataract, consisting of fine feathery streak-like opacities. On examination, his uncorrected visual acuity was 20/50 and J4 at near in both eyes. Under cycloplegia, a moderate hypermetropic refraction was noted in both eyes.

Ocular aberrations and contrast sensitivity after cataract surgery with AcrySof IQ intraocular lens implantation Clinical comparative study.

Purpose: To determine whether implantation of an intraocular lens (IOL) with a modified posterior aspherical surface (AcrySof IQ, Alcon Surgical Laboratories) results in reduced ocular aberrations (spherical aberration) and improved contrast sensitivity after cataract surgery.

Setting: Brasilia Ophthalmologic Hospital, Brasilia, and Sao Geraldo Eye Hospital, Federal University of Minas Gerais, Belo Horizonte, Brazil.

Methods: In an intraindividual randomized prospective study of 25 patients with bilateral cataract, an IOL with a modified posterior surface (AcrySof IQ) was compared with a biconvex IOL with spherical surfaces (AcrySof Natural, Alcon).

[Surgical correction of astigmatism during cataract surgery].

Purpose: To evaluate the effect of peripheral limbar relaxing incisions (PLRI) in the reduction of the astigmatism during cataract surgery.

Methods: We studied prospectively 103 eyes of 103 patients submitted to PLRI, using the Nichamim nomogram during cataract surgery by phacoemulsification. After the first and sixth month we analized the changes in astigmatism topography, induction of astigmatism and success rate.

Outcomes of radiofrequency in advanced keratoconus.

Purpose: To evaluate the use of radiofrequency energy to correct advanced keratoconus.

Setting: Universidade Federal de Minas Gerais, Belo Horizonte, and Universidade de Ciências da Saúde de Alagoas, Maceió, Brazil.

Methods: In this prospective comparative study, radiofrequency was applied to 25 eyes of 21 consecutive patients.

[Pellucid marginal degeneration: diagnosis and treatment].

Pellucid marginal degeneration is characterized by a progressive stromal thinning of the inferior corneal segment, between 4 and 8 o'clock, with a crescentic shape. The area of corneal thinning has a width of about 1 to 2 mm, and it is separated from the corneoscleral limbus by an area of normal corneal tissue. The initial treatment consists of optical correction.

Keratorefractive approaches to achieving pseudoaccommodation.

Although presbyopia is ostensibly an age-related disease of the lens, ciliary body, and zonular apparatus, surgeons have nonetheless persevered in their attempts to create a solution to the problem of diminished near vision by performing keratorefractive procedures. This article discusses two approaches of varying technological sophistication, beginning with surgically induced astigmatism and continuing through enhanced monovision. Sometimes simple solutions are the best, and the technological innovation in cataract and refractive surgery has met with unrivalled success in the last three decades.

[Tarsorrhaphy: applications in a Cornea Service].

Purpose: To evaluate the main indications for tarsorrhaphy in a Corneal Service, as well as success rate and possible complications.

Methods: All patients who underwent tarsorrhaphy from January 1st, 2002 to December 30th, 2002, in São Geraldo Eye Hospital - Federal University of Minas Gerais were evaluated retrospectively. Reviewed data included patient's sex and age, indication for tarsorrhaphy, duration of signs and symptoms before tarsorrhaphy, time for epithelial healing after tarsorrhaphy, type of tarsorrhaphy, complications, follow-up time.