Biomedical subjects

F C Guimarães

Publications and source records attributed to F C Guimarães.

5 recordsLinked to original sources

PubMed1998

Eyelid changes in long-standing leprosy.

To describe eyelid changes in ocular leprosy, 74 patients (148 eyes or 296 eyelids) were examined, focusing on eyelid abnormalities. The adnexal examination included evaluation of the upper eyelid crease pattern, qualitative assessment of the orbicularis oculi muscle function, measurement of the distance between the corneal reflex and the upper eyelid margin (margin reflex distance), and slit-lamp biomicroscopy of the eyelashes and tarsal conjunctiva. Eyelash ptosis was a common finding associated with a multiple upper eyelid crease pattern and trichiasis. In the past, eyelash ptosis has probably been diagnosed as upper eyelid entropion or trichiasis, but in this series entropion was not observed. The distinction between eyelash ptosis, trichiasis, and upper eyelid entropion is important because the surgical management for each is different. Other true leprotic abnormalities of the eyelids are lagophthalmos and lower lid ectropion.

Adult↗

PubMed1997

Quantitative study of the effect of dacryocystorhinostomy on lacrimal drainage.

Using scintigraphy, we have studied the lacrimal drainage from the conjunctival sac of normal subjects and patients who have undergone dacryocystorhinostomy. A mathematical model of drainage was constructed that accurately described the complete activity curves for both groups. The initial rate of drainage was shown to be a relevant parameter to characterize drainage, and it was found to be different from normals to patients, indicating that the lacrimal pump mechanism is affected by dacryocystorhinostomy.

Adolescent↗

PubMed1995

Palpebral fissure height and downgaze in patients with Graves upper eyelid retraction and congenital blepharoptosis.

PURPOSE: To compare the relation between vertical eyelid fissure height and downgaze in healthy subjects and in patients with Graves upper eyelid retraction and congenital blepharoptosis. METHODS: With a caliper rule, the authors measured the vertical eyelid fissure height of 25 patients with no previous history of eye disease, 34 patients with Graves disease, and 16 patients with congenital blepharoptosis. All measurements were done at the primary position and at four levels of downgaze (10 degrees, 20 degrees, 30 degrees, and 40 degrees). In 13 patients with Graves disease, vertical phoria was quantified with a Maddox rod and prism. RESULTS: The relation between vertical eyelid fissure height and downgaze is linear. The slope was identical for the control subjects and for the patients with Graves disease (b = -1.36) but it was almost zero for the patients with congenital blepharoptosis (b = -0.037). When vertical eyelid fissure height was corrected to arc values, the slope of the relation between vertical eyelid fissure height and downgaze was significantly greater for the patients with Graves disease. Vertical phoria was not related to the amount of Graves upper eyelid retraction. CONCLUSIONS: The data support the hypotheses that upper eyelid retraction secondary to Graves eye disease results from hyperactivity of the levator palpebrae superioris muscle.

Adolescent↗

PubMed1995

Congenital shortening of the anterior lamella of all eyelids: the so-called ablepharon macrostomia syndrome.

The so-called ablepharon macrostomia syndrome is an extremely rate congenital condition that includes abnormal ears, an enlarged, fishlike mouth, absence of lanugo, redundant skin, and vertical shortening of all eyelids. Only four cases have been described so far. In these cases the nature of the eyelid anomalies has not been clearly defined. We report one more case showing that the condition is better described as a severe microblepharon because only the anterior lamella of the eyelids is shortened. The literature about this condition is reviewed, and oculoplastic treatment is discussed.

Adolescent↗

PubMed1993

Simplifying scleral fixation of posterior chamber intraocular lenses.

We describe a surgical modification for primary scleral fixation of posterior chamber intraocular lenses. The technique keeps intraocular surgical manipulation at a minimum and allows fixation of the lens during accidental rupture of the posterior lens capsule.

Cataract Extraction↗