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- ICCE
- Acronym for Intra-Capsular Cataract Extraction. Older method of cataract surgery
that involves removal of the entire lens. Some surgeons may still use this method
in selected cases.
See Cataracts in Eye Care Encyclopedia.
See Free Eye Tests.
- illumination
- The amount of light falling onto a surface.
- infant and childhood vision
See Pediatric Wellness in Eye Care Encyclopedia.
See Free Eye Tests.
- infant vision development
- At birth, infants can see patterns of light and dark but have blurred vision of
specific objects. During the first 4 months, the two eyes will begin working
together, with visual horizon expanding, vision becoming clearer and color vision
developing. It is believed that by 4 months, an infant’s color vision is similar to an
adult’s. By 6 months of age, babies acquire eye movement control and eye-hand
coordination skills. It is normal at this stage for an infant’s eyes to appear at times
as crossed or out of alignment. Persistent misalignment should be reported to an
eye care professional.
See Free Eye Tests.
- inferior
- In eyecare terminology, referring to the lower half of the eye.
- Intacs
- Trade name for the plastic half-ring segments used in a type of refractive surgery
called intrastromal corneal ring procedure (ICRS). This procedure involves
implantation of the ring segments in the peripheral area of the cornea. This
changes the cornea’s shape to correct cases of nearsightedness. These rings may
later be removed or replaced.
See Refractive Surgery in Eye Care Encyclopedia.
- interferometer
- An instrument that uses the interference of waves (as of light) for precise determination especially of wavelength, spectral fine structure, indices of refraction, and very small linear displacements.
- Intra-Capsular Cataract Extraction (ICCE)
- Older method of cataract surgery that involves removal of the entire lens. Some
surgeons may still use this method in selected cases.
See Cataracts in Eye Care Encyclopedia.
- intrastromal corneal rings
- Plastic half-ring segments used in a type of refractive surgery called intrastromal
corneal ring procedure (ICRS). This procedure involves implantation of the
segments in the peripheral area of the cornea in order to change its contour to the
shape desired to correct cases of nearsightedness. These rings may later be
removed or replaced.
See Refractive Surgery in Eye Care Encyclopedia.
- intraocular lens (IOL)
- Plastic lens surgically implanted to replace the focusing power of the natural
crystalline lens following cataract extraction or during a refractive surgery
procedure called Clear Lens Extraction.
See cataracts and Refractive Surgery in Eye Care Encyclopedia.
See Free Eye Tests.
- intraocular pressure (IOP)
- Measurement of fluid pressure inside the eye. All eye exams include a measurement of this
eye pressure with an instrument called a tonometer. Glaucoma, the leading cause of
blindness in adults, is caused by a buildup of pressure inside the eye and often occurs
without noticeable symptoms. This buildup puts pressure on the optic nerve, which can
permanently damage eyesight or even cause blindness.
See Free Eye Tests.
- IOL
- Acronym for intraocular lens, plastic lenses that may be surgically implanted to replace
natural crystalline lenses of the eye.
See Free Eye Tests.
- iris
- Ring of pigmented tissue lying behind the cornea that gives color to the eye and controls
the amount of light entering the eye by varying the size of the pupil.
- iritis
- Inflammation of the iris causing pain, tearing, blurred vision, small pupil, and a red
congested eye.
- isopter
- A contour line in a representation of the visual field around the points representing the macula lutea that passes through the points of equal visual acuity.
- itchy eyes
- Condition that can be caused by many factors such as pollutants in the air, allergies,
chemical exposure (swimming pool for instance), sun glare, viral and bacterial infections
and conjunctivitis (pink eye). Home care may involve warm compresses or eye drops. If
symptoms persist, an eye doctor should be contacted.
See Free Eye Tests.
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