Manually prepared lamellae for Descemet stripping endothelial keratoplasty (Pachy-DSEK): comparison of four dissection depths.

Purpose: This study aimed to compare four depths of manual dissection for the preparation of Descemet stripping endothelial keratoplasty lamellae.

Methods: Eye bank corneas were randomized into four groups according to dissection depths: Pachy-100 (incision depth = central corneal thickness-safety margin of 100 µm), Pachy-50 (safety margin of 50 µm), Pachy-0 (no safety margin), and Pachy+50 (incision depth = central corneal thickness + 50 µm). All endothelial lamellae were prepared using a standardized method of manual dissection (Pachy-DSEK).

Intrastromal corneal ring segments followed by PRK for postkeratoplasty high astigmatism: prospective study.

Purpose: To evaluate refractive and topographic results of the association of intrastromal corneal ring segments (ICRS) with photorefractive keratectomy (PRK) for the correction of high (>6.0 diopters [D]) postkeratoplasty astigmatism (PKA).

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

Intrastromal Corneal Ring Segments Implantation and Descemet Membrane Endothelial Keratoplasty for Coexisting Keratoconus and Fuchs Endothelial Dystrophy.

Purpose: To report two cases of coexisting keratoconus and Fuchs endothelial dystrophy treated with intrastromal corneal ring segments (ICRS) implantation and Descemet membrane endothelial keratoplasty (DMEK).

Methods: Two patients with coexisting keratoconus and Fuchs endothelial dystrophy underwent ICRS implantation and DMEK, in a two-stage procedure. Follow-up evaluation included Scheimpflug tomography and optical coherence tomography.

Standardized pachymetry-assisted manual lamellar dissection for Descemet stripping endothelial keratoplasty.

Purpose: To present an alternative technique (Pachy-DSEK) for the manual preparation of thin endothelial lamellae in Descemet stripping endothelial keratoplasty (DSEK), as well as to evaluate its visual and anatomic outcomes.

Methods: A retrospective chart review was conducted in 15 cases who underwent DSEK at a private eye clinic in Brazil (INOB, Brasília) from June 2017 to December 2019. All patients had ocular comorbidities and relative contraindications to Descemet membrane endothelial keratoplasty (DMEK).

Intracorneal Ring Segments Implantation Outcomes Using Two Different Manufacturers' Nomograms for Keratoconus Surgery.

Purpose: To compare the outcomes of intracorneal ring segments (ICRS) implantation in keratoconic eyes with a similar tomographic pattern, using two different manufacturers' nomograms for surgical planning.

Methods: ICRS were implanted alternately in patients with the same tomographic pattern of keratoconus divided into two groups according to the surgical planning proposed by the ICRS manufacturers (Keraring, Mediphacos, Belo Horizonte, Brazil, and Ferrara Ring, AJL Ophthalmics, Vitoria, Spain). Visual, refractive, keratometric, corneal aberrometry, and optical quality changes were evaluated during a 6-month follow-up.