Cornea is the window of the eye through which light rays
fall on the retina, Cornea can be affected by a wide range of conditions
like malnutrition, infection, injuries and degeneration. In India
infection and injuries are the main cause of corneal related blindness.
This departments managing all types of anterior segment inflammations, infections,
injuries and ocular surface diseases. It is well equipped like topography,
specular microscopy and pachymeter. We are performing various anterior
segment micro surgeries, including corneal grafting, surgical repair of
the injured eyes and pterygium surgeries. A well equipped Refractive
Surgery Unit, Contact Lens Clinic and Eye Collection Centre are attached
to this department.
Normally, glands in your eyelids manufacture tears which
are washed across your eye every time you blink. When your eye produces
too few tears, or when the tears drain too quickly from the eye, the
resulting condition is called "Dry Eye".
What to look for?
Your eyes may burn or feel itchy, gritty, red, and dry. In
some cases, the eyelids may stick together upon awakening in the morning.
Difficulty in wearing contact lens, hay fever or sinus problems, and
recurring infection may also be associated with dry eye condition.
During your first visit, you will probable be given Schirmer tear strip
paper test, in which a small strip of paper is placed inside the lower
eyelid to determine if you have normal tear production.
What to Do?
Dry eye may be related to a number of causes and if left untreated, may lead to eye conditions including corneal infections
and ulcers, conjunctivitis, chalazion and pterygium. The common first
treatment for dry eye is eye drops known as "Artificial Tears".
Artificial tears bring relief to many people, but they are not a permanent
solution to the dry eye. Advanced techniques have been developed which in
many cases, can dramatically improve the dry eye condition. These
procedures are relatively simple and can be performed on an outpatient
basis, without requiring a hospital stay. If you believe you may have dry
eye, we urge you to make an appointment with our office for an evaluation.
Who is affected?
As we age, our eyes produce fewer tears -60% fewer at age
65 than at age 18, in fact. Thus older adults often suffer from dry eye,
as do pregnant and menopausal women. However, dry eye is a relatively
common condition which can and does affect people of all ages and
Causes Of Dry Eye
the common causes of dry eye are irregularities in the blinking process.
Interestingly, both those who blink infrequently and those who blink
constantly may experience an imbalance of tears in their eyes. Dry eye may
also be caused by medications such as antihistamines, decongestants and
heart medications. There are some studies which link
Vitamin A deficiency to dry eye syndrome. Overexposure to sun, wind, smog
,air conditioners, smoke or aerosols such as hair spray may aggravate or
initiate a dry eye condition in some people. Finally, an overly-large
punctum or drainage canal in the eye may let your tears drain away too
Tears are very complex liquid produced by glands located
behind the upper eyelids. In the normal eye , the blinking movement of the
lids takes this material and forms watery layer over the exposed part of your eye. This watery
layer renews itself with each blink. The film of tears which coat your
eye is actually composed of three separate layers. The outer most layer
called the lipid, is oily to minimize evaporation, the middle or aqueous
layer, contains many; substances including Vitamin A , and the
antibacterial agents lysozyme and lactoferrin, the mucin layer, which is
directly next to the surface of the eye acts as a lubricating coat and
binds lysozyme and other substances that protect the eye from infection.
How Tears Work
The eye produces about 400 drops of tears per day. These
flow across the eye and drain into small openings called the upper and
lower puncta. From the punctum, the tears drain through a canal, into the
tear sac and finally into the nasal passage. For many people, restricting
or closing of one or both these openings improves the dry eye condition.
The Tear Test
To determine if closure or restriction of the punctum may
be appropriate for you, we often perform an implant tear test. In addition
we may wish to determine the quality of the watery portion of your tears.
An implant about the size of a grain of rice is inserted in the tear
drainage canals. The procedure is relatively simple and painless. Once in
place, these implants act like stoppers in a sink so that tears on the
surface of the eye are prevented from draining away. To measure the
quality of your tears we may take tear samples with a small circle of
absorbed paper or sampling tube. If we find the symptoms of red, itchy,
burning eyes disappeared with the implants in place, you and your
consultant will come to conclusion that permanent punctum plugs are alternate methods to close or
restrict the punctum would be appropriate
eye allergy is an allergic response to allergens in your environment that
cause symptoms such as swollen, itchy eyes. These allergens may be
seasonal or they may be found in common substances , cosmetics, to which
many people react year-round . An eye allergy can be either an immediate
or delayed reaction. The name for an eye allergic reaction is allergic
conjunctivitis. Seasonal allergic conjunctivitis is typically caused
by pollen released into the air by flowers, grasses and weeds. Symptoms
are most severe when the pollen counts are highest, during the spring
months and late summer through fall months. Perennial allergic
conjunctivitis produces symptoms year-round because the allergens that
trigger pace are always present . Dust mites and pet dander cause most
cases of this type of ocular allergic response. Other common allergens
causing perennial allergic
conjunctivitis are mold, air, pollutants, smoke, and cosmetics.
What Causes Allergic
When your are exposed to a substance that your body
considers "foreign," such as pollen, dust , or pet dander, cells
in your eyes called mast cells are alerted. These cells in turn release a
number of chemical substances that cause the symptoms of allergic
What Are The Signs And Symptoms
Of Allergic Conjunctivitis?
Itching is the most common symptom of allergic conjunctivitis. Burning, redness and watering of the eyes are other
common symptoms of allergic conjunctivitis . You may also experience
swelling, puffiness and /or throbbing, dry, gritty eyes. Some people with
allergic conjunctivitis may also be unusually sensitive to light. The
conjunctiva of the eye is a thin lining on the inside of the eyelid
that extends over the white part of the eye. The conjunctiva and the
eyelid usually act as a natural barrier to a wide range of foreign
invaders including bacteria and viruses. The conjunctiva is the part of
the eye that becomes inflamed during an ocular allergic reaction. Allergic
conjunctivitis is not only frustrating and painful but can also become a
significant inconvenience . For example, eye allergies can interrupt your
ability to concentrate, cause fatigue, and , in some severe cases, prevent
you from driving a car because you simply can't see well enough. You may
also feel uncomfortable about your appearance if your symptoms are
Treatment Of Allergic
can I minimize the effects of allergic conjunctivitis?
The best way to minimize the effects of allergic conjunctivitis ,
including irritation, is to control your exposure to allergens by taking
such simple measures as:
Washing your hands, face, and hair frequently to rid them of allergens.
Using air filters indoors and vacuuming regularly.
Avoiding the outdoors when the pollen counts are high.
Closing windows and doors to keep allergies out.
If you have itchy eyes, try to avoid touching or rubbing them because you
may introduce the allergen directly into your eyes and aggravate your
condition. Aggravating your condition may result in further damage to your
eyes and/ or to the development of more serious eye problems. Instead ,
apply a cool compress to your eyelids, or try using an over-the- counter
(OTC, or nonprescription) artificial tears product.
The Contact Lens Service, working with the staff of the
Cornea & Anterior Segment Service, offers a full range of therapeutic
contact lens services, including those for patients with corneal surface
disorders, keratoconus, corneal leukoma, albinism, and aniridia. Contact
lens evaluation and fitting for infants and children is routinely
Rose - K Lens
C3R alone or in combination with Intacs or Rose K lens allows improved vision & comfort to patients,C3R is a simple, safe and effective procedure in the management of progressive ectatic disorders of of the cornea.
Three Lens Designs
(Rose K2, Rose K2 IC, Rose K2 Post Graft)
To fit all corneal shapes and one simple systematic approach to fitting.
The Rose K lens is available in fitting set up to 25 lenses. (boston material non uv.) with various base curve range and flexible edge lift system.
Aberration control aspheric optics providing outstanding acuity, reduced flare and glare and minimal lens mass. Reverse geometry fitting curves provide better fit and comfort (Rose K2 IC & Rose K2 Post Graft)
Advanced fitting options include
- Toric peripheral curves
- Asymmetric corneal technology or ACT
- Front, back & Bi Toric designs
Extensive diameter and base curve range
Fits all corneal shapes, sizes and stages of keratoconus because of the unique design that changes as the base curve steepens. Therefore Rose K lens can be used to fit all types of Keratoconus, i.e., Niple, Oval, & Globus Cones, Pellucid Marginal Degeneration, Post Keratoplasty patients.
Collagen Cross Linking (CXL /C3R) with Riboflavin
C3R is performed by exposing the eye to UV A radiation of 3mW/cm2 for 30 min, by simultaneous installation of Riboflavin drops that releases oxygen radicals which in turn induce covalent bonds between collagen fibres and thus increases the stiffness of the cornea.
- Progressive Keratoconus
- Post Refractive Surgery Ectasias
- Pellucid marginal degeneration
- Corneal thickness less than 400 microns
- Pregnancy and immunocompromise patients
- Diabetes ,Herpetic keratitis