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LASIK
Saturday, January 26, 2008
GALILEI
For good measurements, getting the red cross aligned very precisely is essential. The single red line needs to
be about right. One good alternative way to get this single red line correctly aligned is to only look at the top
view (where the red cross is) and get the iris of the patient into the best possible focus. This method will allow
you to concentrate on one picture only whilst aligning the device. This makes it quicker and easier as well.
Other factors of importance are tear film and shadows of the nose and eye lashes.
All these success factors lead to the following best practice for taking measurements:
1. align the instrument to about the right position: get the red cross on the four spots and get the iris into
sharp focus.
2. now ask the patient to BLINK and OPEN EXTRA WIDE
3. quickly make the final adjustments of the device to get the red cross right and the iris sharp
4. and push the button on top of the joystick
The data will now be processed and as soon as that is done the Verify And Edit Screen will appear and with
that a pop up with one overall quality percentage and 5 specific ones.
The Overall Quality is an important indicator and should be
greater than 90% in general. Also important is Motion
Compensation Quality which should also be more than 90%.
The Motion Compensation Quality indicates how well the
patented eye tracker system had been able to follow the eye
movement during the procedure. Eye tracking is critical for
combining all the data points of the different images that are
taken in one measurement.
be about right. One good alternative way to get this single red line correctly aligned is to only look at the top
view (where the red cross is) and get the iris of the patient into the best possible focus. This method will allow
you to concentrate on one picture only whilst aligning the device. This makes it quicker and easier as well.
Other factors of importance are tear film and shadows of the nose and eye lashes.
All these success factors lead to the following best practice for taking measurements:
1. align the instrument to about the right position: get the red cross on the four spots and get the iris into
sharp focus.
2. now ask the patient to BLINK and OPEN EXTRA WIDE
3. quickly make the final adjustments of the device to get the red cross right and the iris sharp
4. and push the button on top of the joystick
The data will now be processed and as soon as that is done the Verify And Edit Screen will appear and with
that a pop up with one overall quality percentage and 5 specific ones.
The Overall Quality is an important indicator and should be
greater than 90% in general. Also important is Motion
Compensation Quality which should also be more than 90%.
The Motion Compensation Quality indicates how well the
patented eye tracker system had been able to follow the eye
movement during the procedure. Eye tracking is critical for
combining all the data points of the different images that are
taken in one measurement.
posted by eyeman at 11:11 AM
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Thursday, January 24, 2008
Dry eyes
The cornea is the front surface of the eye. Similar to windshield wipers eyelids spread tears across the cornea to yield a polished optical surface and hence better vision.
The Waterworld of the Eye:
Like a tap pumping out water, the tears are secreted by the lacrimal glands and accessory lacrimal glands. Luckily there is no bill to pay. The eye lids act as windshield wipers which spread the tears evenly across the cornea polishing the optical surface. Finally the tears go down the drain thru puncti (small openings in the lid margin) to the nasolacrimal duct and into the nose. That is why when you put drops in the eyes sometimes you get a funny taste in the mouth.
Importance of Tears:
The tears are a combination of aqueous, lipid and Meibomian gland secretions each of which must be in proper ratio and volume. The natural tears are also an important source of minerals enzymes and antimicrobial substances like the lysozymes. These various substances are important to protect the eye from infection by killing microbes on the surface of the eye. Natural tears also provide nourishment to the top layers of the cornea. When the body is not able to make enough tears to protect the surface of the eye, cells on the front part of the cornea become sick or even die leading to a variety of symptoms that affect both comfort and vision. Prolonged reading or computer work can often cause evaporation of the tear film. Dry eyes can also be caused by hormone changes, allergies, auto-immune disease, eye surgery, contact lens wear, eye infections and drugs such as oral antihistamines, anti-depressants or hormone replacement therapy. Environmental factors such as exposure to cigarette smoke or other chemicals can also lead to problems.
The Waterworld of the Eye:
Like a tap pumping out water, the tears are secreted by the lacrimal glands and accessory lacrimal glands. Luckily there is no bill to pay. The eye lids act as windshield wipers which spread the tears evenly across the cornea polishing the optical surface. Finally the tears go down the drain thru puncti (small openings in the lid margin) to the nasolacrimal duct and into the nose. That is why when you put drops in the eyes sometimes you get a funny taste in the mouth.
Importance of Tears:
The tears are a combination of aqueous, lipid and Meibomian gland secretions each of which must be in proper ratio and volume. The natural tears are also an important source of minerals enzymes and antimicrobial substances like the lysozymes. These various substances are important to protect the eye from infection by killing microbes on the surface of the eye. Natural tears also provide nourishment to the top layers of the cornea. When the body is not able to make enough tears to protect the surface of the eye, cells on the front part of the cornea become sick or even die leading to a variety of symptoms that affect both comfort and vision. Prolonged reading or computer work can often cause evaporation of the tear film. Dry eyes can also be caused by hormone changes, allergies, auto-immune disease, eye surgery, contact lens wear, eye infections and drugs such as oral antihistamines, anti-depressants or hormone replacement therapy. Environmental factors such as exposure to cigarette smoke or other chemicals can also lead to problems.
posted by eyeman at 12:45 PM
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Saturday, January 19, 2008
Dr. Liu's office
Corona, Ca has a new buzz. The young dynamic Dr. Liu has joined the Khanna Institute of lasik and refractive (Khanna Vision). His office is his base. He serves people from both Riverside and Orange County. Appointments can now be made to see him Monday to Saturday.
posted by eyeman at 3:42 AM
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Hope for WW2 veteran
Dr.khanna operated on a world war 2 veteran who had a rifle blow up in his face 50 yrs ago.
He had a truamatic cataract.
This surgery was done in Corona.
He had a truamatic cataract.
This surgery was done in Corona.
posted by eyeman at 3:38 AM
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Monday, January 14, 2008
Dr. Hollenhorst
We republish an obituary. Hollenhorst plaques are cholestrol bodies which are helpful in knowing who may be at risk for strokes. Eyes are the windows to the entire body. This is the only place where actual blood vessels can be visualized.
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ROCHESTER -- Dr. Robert W. Hollenhorst, 94, a Mayo Clinic physician and pioneer in neuro-ophthalmology, died Thursday (Jan. 10, 2008) in Rochester.
Born Aug. 12, 1913, in St. Cloud, Minn., he attended St. Cloud State Teachers College, St. John's University, and the University of Minnesota Medical School. During World War II, he served in the Army Medical Corps in the Pacific, and was awarded a Bronze Star for his medical role in several amphibious landings in New Guinea and the Philippines. Following his discharge in 1946, Dr. Hollenhorst began his career as an ophthalmologist at Mayo Clinic and professor at the Mayo Graduate School of Medicine. He retired in 1979 and lived in the Brainerd Lakes area until moving back to Rochester in 1996.
He was a member of many medical boards and associations, and served terms as president of the American Ophthalmology Society and vice chairman of the American Board of Ophthalmology. In 1986 he was awarded the prestigious Howe Medal by the AOS.
Dr. Hollenhorst was founder of the Minnesota Pre-School Survey of Vision and Hearing, and for 30 years was consulting ophthalmologist to Minnesota State Services for the Blind. For his contributions to the state, Gov. Arne Carlson declared April 24, 1991, "Dr. Robert Hollenhorst Day."
Some of his research described a phenomenon now known as "Hollenhorst Plaques." These cholesterol bodies, sometimes found in the blood vessels of the retina, are useful in diagnosing the risk of stroke and other circulatory problems.
Survivors include
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ROCHESTER -- Dr. Robert W. Hollenhorst, 94, a Mayo Clinic physician and pioneer in neuro-ophthalmology, died Thursday (Jan. 10, 2008) in Rochester.
Born Aug. 12, 1913, in St. Cloud, Minn., he attended St. Cloud State Teachers College, St. John's University, and the University of Minnesota Medical School. During World War II, he served in the Army Medical Corps in the Pacific, and was awarded a Bronze Star for his medical role in several amphibious landings in New Guinea and the Philippines. Following his discharge in 1946, Dr. Hollenhorst began his career as an ophthalmologist at Mayo Clinic and professor at the Mayo Graduate School of Medicine. He retired in 1979 and lived in the Brainerd Lakes area until moving back to Rochester in 1996.
He was a member of many medical boards and associations, and served terms as president of the American Ophthalmology Society and vice chairman of the American Board of Ophthalmology. In 1986 he was awarded the prestigious Howe Medal by the AOS.
Dr. Hollenhorst was founder of the Minnesota Pre-School Survey of Vision and Hearing, and for 30 years was consulting ophthalmologist to Minnesota State Services for the Blind. For his contributions to the state, Gov. Arne Carlson declared April 24, 1991, "Dr. Robert Hollenhorst Day."
Some of his research described a phenomenon now known as "Hollenhorst Plaques." These cholesterol bodies, sometimes found in the blood vessels of the retina, are useful in diagnosing the risk of stroke and other circulatory problems.
Survivors include
posted by eyeman at 8:58 AM
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Curves
We are pleased to announce that the Open House of our LASIK and Refractive Surgery Center in Corona, CA was a major success.(more to follow)Also the makeover of Corna lasik office was smooth and well aprreciated by the staff and patients.
posted by eyeman at 8:46 AM
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Corona makeover
Our front office in Corona.
Where we have introduced multifocal lenses, LASIK
Dr. Mike Liu has joined the group.
Dr. James Davidian has an experience of more than 25 years.
Where we have introduced multifocal lenses, LASIK
Dr. Mike Liu has joined the group.
Dr. James Davidian has an experience of more than 25 years.
posted by eyeman at 8:22 AM
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Sunday, January 13, 2008
Ha Ha LASER
A Legal Indian immigrant went to the DMV to apply for a driver's license.
First, of course, he had to take an eye sight test. The ophthalmologist showed him a card with the letters:'C Z M U T H U S W A M Y.'
"Can you read this?" the doctor asked.
"Read it?" the gentelamn replied, "I know the guy."
P.S humor is the spice of life. This or any other joke is meant for entertainement purposes only, and not to typecast any community or country.
First, of course, he had to take an eye sight test. The ophthalmologist showed him a card with the letters:'C Z M U T H U S W A M Y.'
"Can you read this?" the doctor asked.
"Read it?" the gentelamn replied, "I know the guy."
P.S humor is the spice of life. This or any other joke is meant for entertainement purposes only, and not to typecast any community or country.
posted by eyeman at 12:34 PM
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Saturday, January 12, 2008
Dont Quit
Don't Quit!
When things go wrong, as they sometimes will,
When the road you're trudging seems all uphill,
When the funds are low and the debts are high,
And you want to smile, but you have to sigh,
When care is pressing you down a bit,
Rest, if you must, but do not quit.
Life is queer with its twists and turns,
As every one of us sometimes learns,
And many a failure turns about,
When he might have won had he stuck it out;
Often the goal is nearer than,
It seems to a faint and faltering man,
Often the struggler has given up,
When he might have captured the victor's cup,
And he learned too late when the night slipped down,
How close he was to the golden crown.
Success is failure turned inside out - The silver tint of the clouds of doubt,
And you never can tell how close you are,It may be near when it seems so far,
So stick to the fight when you're hardest hit
It's when things seem worst that you must not quit.
An inspirational poem my dad gave to me in medical school
When things go wrong, as they sometimes will,
When the road you're trudging seems all uphill,
When the funds are low and the debts are high,
And you want to smile, but you have to sigh,
When care is pressing you down a bit,
Rest, if you must, but do not quit.
Life is queer with its twists and turns,
As every one of us sometimes learns,
And many a failure turns about,
When he might have won had he stuck it out;
Often the goal is nearer than,
It seems to a faint and faltering man,
Often the struggler has given up,
When he might have captured the victor's cup,
And he learned too late when the night slipped down,
How close he was to the golden crown.
Success is failure turned inside out - The silver tint of the clouds of doubt,
And you never can tell how close you are,It may be near when it seems so far,
So stick to the fight when you're hardest hit
It's when things seem worst that you must not quit.
An inspirational poem my dad gave to me in medical school
posted by eyeman at 7:49 AM
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1-888-LASIK-19
805-230-2126
1220 La Venta Dr., Suite 209, Westlake Village, CA 91361
[Directions]
Santa Monica Eye Care office
808 Wilshire Blvd. Suite #140, Santa Monica, CA 90401
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Simi Eye Care office
2417 Sycamore Dr., Simi Valley, CA 93065
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Beverly Hills Lasik Disclaimer: Dr. Khanna serves the eyecare community in Beverly Hills, Los Angeles and surrounding areas. This site is for informational purposes only. It is not intended to be medical advice for those seeking eye surgery, but to provide information about the Los Angeles, California eye surgery practice of Rajesh Khanna, M.D.
