Think Tank

Embryology of the human Eye

The human eye anatomically is considered as an extension of the brain.the central nervous develop from the neural tube.A thickening appears on either sides of the neural tube in its anterior part known as OPTIC PLATE.The optic plate grows as the Foetus(baby) grows towards the surface to form the OPTIC VESICLE.the two eyes develop from these two optic vesicles.the neural ectoderm and mesoderm come together to form the optic vesicles.
As the foetus grows the optic visicles invaginates from in front and below to form the OPTIC CUP. there is a line of invagination that remains open  for sometime known as the embryonic fissure.the hyloid artery enters through the fissure to provide nutrients to the developing structures.later atrophies found dissapears.
The inner layer of the retina(main) is formed by the inner layer of the optic cup whiles the outer layer develops into the pigmented epithelium.the neural ectoderm is responsible for the secretion of the jelly-like fluid called the VITREOU…


Huraaaaay!  Summer is here once again...... Enjoy the best of every moment with your family and friends . Summer with all the fun that comes seasonally with it, brings many medical conditions that causes discomforts in the life of many individuals who fall a victim to the season due to their body's reaction to the weather . As many cant wait for summer to come,others fear for the seasons return because of their eye ALLERGIES that  recurrently occurs every summer ;medically its called VERNAL  KERATOCONJUNCTIVITIS (spring catarrh).

Allergies are simply a hypersensitivity reaction of the human body following exposure to noxious stimuli in the environment.(pollen,dust,smoke,snow,perfumes,contact lenses,drugs,surgical sutures etc).Allergens as type 1 (immediate ) hypersensitivity reaction resulting in the secretion of eosinophils and mast cell degranulation causing inflamation,itchy sensation,redness,pain and tearing of the eyes.
Signs/symptoms Red…


RED EYES Red eye is a common sign seen in many eye conditions; most often people get eye drops from nearby pharmacies when these symptoms are seen.Self medication by patients often worsen their eye conditions due to wrong drug prescriptions acquired.the eye conditions sometimes report to doctors late resulting in majority of visual impairments.this article will give all patients an idea about common causes of red eyes,symptoms and plan if confused about actions needed if your eyes getred. Red eye is simply occurs when small blood vessels that are present on the surface of the eye(conjunctiva) becomes enlarged congested with blood.

This often happens when there an insufficient amount of oxygen supplyto the cornea,trauma,or an infection to eye tissues. Red eye normally is no cause for alarm but may be dangerous when it comes with signs and symptoms like: - Pain - Reduced vision - Abnormal discharge from the eye  - Difficulty looking at light - Problem with moving eye and headaches 
 RULE 1: SEE …