Methods of examination of glaucoma

Perimetry: 

Perimetry is the way toward graphing or recording the visual field. Visual field is characterized as an island of vision encompassed via ocean of obscurity. The visual field stretches out to 60 degrees nasally, 50 degrees superiorly, 90 degrees transiently and 70 degrees poorly.

Methods of examination glaucoma

Gonioscopy: 

It's a procedure of analyzing the perspective of a foremost chamber point. Foremost chamber point is not noticeable through the cornea because of aggregate corneal reflection. Gonioscope disposes of the aggregate interior reflection and perspectives the point structure.

Methods of examination of glaucoma

Gonioscopy: 

It's a procedure of analyzing the perspective of a foremost chamber point. Foremost chamber point is not noticeable through the cornea because of aggregate corneal reflection. Gonioscope disposes of the aggregate interior reflection and perspectives the point structure.

Classification of glaucoma

Glaucoma is arranged into essential glaucoma and auxiliary glaucoma. Essential glaucoma is additionally characterized into essential open edge glaucoma and essential conclusion glaucoma. Open edge glaucoma is brought on because of expanded resistance in the trabecular meshwork. Edge conclusion glaucoma is brought about because of blockage of watery funniness surge because of mechanical conclusion of front chamber edge by the fringe iris.

Angle Structure

The range in the front chamber where the cornea and Iris joins is called as point. It's made of a few structures and aides in the waste of fluid diversion. The watery funniness is water like fluid that fills the space amongst cornea and iris in the front chamber. It's framed in the ciliary body, courses through the pupillary space into the front chamber and exists out of the eye through the edge structure. It offers sustenance to cornea and crystalline focal point. Nearness of watery amusingness in foremost chamber offers shape to the front segment of the eye. The creation and seepage of watery liquid decides the eyes intra visual pressure(IOP).

Glaucoma

Glaucoma is an ailment in which intra visual weight is raised which make harm visual field and optic circle. At the point when eye weight expands it obstruct the trabecular meshwork and edge structure winds up noticeably shut where fluid diversion exists.

Measures of corneal reflex

1 mm decentration of corneal reflex =7degrees=15 crystal degrees.

2 mm decentration of corneal reflex on pupillary edge = 15 degrees = 30 crystal diopter.

4 mm decentration of corneal reflex on mid iris = 30 degrees = 60 crystal diopter.

6 mm decentration of corneal reflex on limbus = 45 degrees = 90 crystal diopter.

Hirschberg Test

It's utilized to gauge eye misalignment in patients which can't coordinate for cover test or who have poor obsession. The analyst sparkles the light and looks at the corneal light reflex. Typically the corneal light reflex is somewhat nasal to the focal point of cornea. 

On the off chance that the corneal light reflex is seen transiently then that eye is veered off nasally (esotropia) and if corneal light reflex seen nasally that eye is digressed transiently (exotropia).

Results of Cover-uncover and alternate cover test

Continuously watch the revealed eye in the cover-uncover test and dependably watch the eye being revealed amid the other cover test. 

Any development of the eyes to get obsession shows the patient has a deviation and the bearing of development demonstrates the kind of deviation eso, exo, hypo or hyper.

Observation of alternate cover test

*The development of revealed eye is noted as the cover is moved from one eye to the next 

* If the eye moves inwards to take up obsession as it is revealed, then patient has exotropia 

* If the eye moves outside to take up obsession as it is revealed, then patient has esotropia 

*If both eyes stayed settled on the objective amid this test then the patient has ortho.

Alternate cover test

The alternate cover test is useful to measure total deviation. It doesn't separate phoria from tropia. During alternate cover test, the cover is placed alternately infront of each eye rapidly in order to break the fusion.

Observation of Cover-uncover test

During this test the examiner covers one eye repeatedly observes for
* The movement of the uncovered eye
*The movement and position of the covered eye as the cover is removed
*Then test is done on the other eye
*If uncovered moves to take up fixation, then the patient has tropia.

Cover -Uncover test

Cover-reveal test is valuable for the nearness of show strabismus(squint) and furthermore separate phoria and tropia.