Questions: 1. -1.00 streak axis 90 -1.50 streak axis The Rx in negative cyl: The type of astigmatism: 2. +3.25 streak axis 100 +1.75 streak axis The Rx in negative cyl: The type of astigmatism: 3. Plano streak axis 70 +1.25 streak axis The Rx in negative cyl:

1. -1.00 streak axis 90 -1.50 streak axis 180 The Rx in negative cyl: The type of astigmatism: Find the spherical power -1.50 D Find the cylindrical power -1.00 - (-1.50) = +0.50 D Find the axis 180 Write the Rx in negative cyl -1.50 +0.50 x 180 Find the type of astigmatism With-the-rule astigmatism (The axis is within 30 degrees of 180, which is considered with-the-rule)

\( \boxed{\text{Rx: -1.50 +0.50 x 180}} \) \( \boxed{\text{Type of astigmatism: With-the-rule}} \)

2. +3.25 streak axis 100 +1.75 streak axis 10 The Rx in negative cyl: The type of astigmatism: Find the spherical power +1.75 D Find the cylindrical power +3.25 - (+1.75) = +1.50 D Find the axis 10 Write the Rx in negative cyl +1.75 -1.50 x 10 Find the type of astigmatism Against-the-rule astigmatism. The axis is within 30 degrees of 90, which is against-the-rule.

\( \boxed{\text{Rx: +1.75 -1.50 x 10}} \) \( \boxed{\text{Type of astigmatism: Against-the-rule}} \)

3. Plano streak axis 70 +1.25 streak axis 160 The Rx in negative cyl: The type of astigmatism: Find the spherical power Plano or 0.00 D Find the cylindrical power 0.00 - (+1.25) = -1.25 D Find the axis 70 Write the Rx in negative cyl Plano -1.25 x 70 or 0.00 -1.25 x 70 Find the type of astigmatism Oblique astigmatism. The axis is not within 30 degrees of 180 or 90, so it is considered oblique.

\( \boxed{\text{Rx: Plano -1.25 x 70 or 0.00 -1.25 x 70}} \) \( \boxed{\text{Type of astigmatism: Oblique}} \)

\( \boxed{\text{1. Rx: -1.50 +0.50 x 180, Type of astigmatism: With-the-rule}} \) \( \boxed{\text{2. Rx: +1.75 -1.50 x 10, Type of astigmatism: Against-the-rule}} \) \( \boxed{\text{3. Rx: Plano -1.25 x 70 or 0.00 -1.25 x 70, Type of astigmatism: Oblique}} \)