[Interferon-alpha toxicity and reversible bilateral optical neuropathy: a timely withdrawal of the drug].

Clinical case A patient with chronic, painless, bilateral loss of vision, after significant intake of interferon (IFNα) and ribavirina due to liver transplant. Ocular fundus is normal. A suspected retrobulbar optic neuropathy is confirmed by a prolongation of the latency of the patient's visual evoked potential.

[Fingerprint microcystic dystrophy: Episodes of irregular astigmatism and their topographical representation].

Case Study: A 44 year-old male patient suffering from painless bouts of blurred vision and with no visible ophthalmological repercussions initially. After one of these clinical episodes we managed to visualise fingerprint images in the anterior pole, as well as corneal, pachymetric and topographical changes, which in turn produce the symptomatic refractive changes.

Discussion: Fingerprint keratopathy is a condition diagnosed through recurring corneal erosion.

[Iridoschisis associated to congenital syphilis: serological confirmation at the 80's].

Clinical Case: Female in her eighties is admitted suffering from unilateral ocular pain. On examination we observed, as well as corneal abrasion, a bilateral iridoschisis with a frayed iris, unfolded between its stromal layers.

Discussion: This rare case is related either to senile degenerative change or to angle-closure glaucoma.

[Congenital retinal macrovessels: a discovery by chance].

Clinical Case: Congenital retinal macrovessels, where an aberrant retinal vessel, usually a venule, is present in the posterior pole and may cross the avascular foveal region, are seen rarely.

Discussion: Most of these cases are unilateral and stable with excellent visual prognosis and are detected on routine examination. Foveal cysts, hemorrhages and displaced foveola may also be seen.

[Outcomes of macular hole surgery using three different surgical techniques].

Purpose: To compare the effectiveness, efficiency and complications of three different surgical techniques employed for the treatment of macular holes between 1998 -2004 in our health care centre.

Methods: A retrospective, comparative, and non-randomized study of 131 eyes with macular holes, stage III and IV, treated with three different surgical techniques was performed. Vitrectomy was performed in 25 eyes (group 1).