What is lacquer cracks?


What is lacquer cracks?

Abstract. Purpose: Lacquer cracks are found in the posterior fundus of 4.3% of highly myopic eyes. They represent healed and mechanical breaks of the retinal pigment epithelium, Bruch’s membrane, and choriocapillaris complex.

What are the features of pathological myopia?

Pathologic myopia occurs when high myopia (defined as an eye with a refractive error of greater than −6.0 diopters) is accompanied by characteristic degenerative changes in the sclera, choroid, and retinal pigment epithelium (RPE) associated with decreased vision.

What are the fundus changes in pathological myopia?

DEGENERATIVE MYOPIA: Refractive error which is associated with fundus changes (during the “fundus changes” progression, the visual acuity is getting worse); Myopic fundus changes-classification: A/ RETINA: Posterior staphyloma Chorioretinal atrophy. Optic disc changes = 1-3.

What is the difference between high myopia and pathologic myopia?

Pathologic myopia is distinctly different from high myopia. High myopia is a high degree of myopic refractive error, whereas pathologic myopia is defined by a presence of typical complications in the fundus (posterior staphyloma or myopic maculopathy equal to or more serious than diffuse choroidal atrophy).

How is pathological myopia diagnosed?

Pathological myopia is diagnosed based on fundus examination (examination of the components at the back of the eye including the retina, the optic disc, the macula and the fovea).

What is the fundamental nature of pathologic myopia?

Pathologic myopia is defined by the presence of posterior staphylomas and/or the presence of myopic chorioretinal atrophy equal to or more serious than diffuse atrophy. Myopic CNV is the most frequent cause of central vision loss. Ultra wide-field OCT is a useful tool to detect posterior staphylomas.

What are lacquer cracks in retina?

Lacquer cracks are breaks in Bruch’s membrane frequently observed in the posterior pole of a highly myopic eye. These distinctive fundus changes are actually quite common in axial myopia and may augur hemorrhage into the macular area, either from mechanical causes or from choroidal neovascularization.

How do I stop my lacquer from cracking?

Spray a full wet coat of lacquer on the door, using either a compressed air spray gun or an aerosol can. The coat should be thick enough to be visibly liquid and to stay wet for several minutes. As the fresh lacquer softens and combines with the old, the finish will flow and level out, and the cracks should disappear.

What causes pathological myopia?

The main factors proposed for driving the development of pathologic myopia are elongation of the axial length and posterior staphyloma. Biomechanical forces related to axial elongation of the eye result in stretching of the ocular layers and progressive thinning of the retina, choroid and sclera.

Can pathological myopia be treated?

Treatment. There is currently no cure for pathological myopia. Individuals with stable high myopia will be followed up regularly for visual acuity, refraction, and general ophthalmic health. With glasses or contact lenses stable high myopathy can be corrected by altering the way in which light rays bend in the eye.